diff --git a/htdocs/css/admin.css b/htdocs/css/admin.css
index 038c25c..24aa8fc 100644
--- a/htdocs/css/admin.css
+++ b/htdocs/css/admin.css
@@ -85,4 +85,21 @@ table.bookmarks .frequency {
 .sdr-device-list .list-group-item,
 .sdr-profile-list .list-group-item {
     background: initial;
+}
+
+.removable-group.removable {
+    display: flex;
+    flex-direction: row;
+}
+
+.removable-group.removable .removable-item {
+    flex: 1 0 auto;
+}
+
+.removable-group.removable .option-remove-button {
+    flex: 0 0 70px;
+}
+
+.option-add-button, .option-remove-button {
+    width: 70px;
 }
\ No newline at end of file
diff --git a/htdocs/lib/settings/OptionalSection.js b/htdocs/lib/settings/OptionalSection.js
new file mode 100644
index 0000000..8c60fa4
--- /dev/null
+++ b/htdocs/lib/settings/OptionalSection.js
@@ -0,0 +1,26 @@
+$.fn.optionalSection = function(){
+    this.each(function() {
+        var $section = $(this);
+        var $select = $section.find('.optional-select');
+        var $optionalInputs = $section.find('.optional-inputs');
+        $section.on('click', '.option-add-button', function(e){
+            var field = $select.val();
+            var group = $optionalInputs.find(".form-group[data-field='" + field + "']");
+            group.find('input, select').prop('disabled', false);
+            $select.parents('.form-group').before(group);
+            $select.find('option[value=\'' + field + '\']').remove();
+
+            return false;
+        });
+        $section.on('click', '.option-remove-button', function(e) {
+            var group = $(e.target).parents('.form-group')
+            group.find('input, select').prop('disabled', true);
+            $optionalInputs.append(group);
+            var $label = group.find('> label');
+            var $option = $('<option value="' + group.data('field') + '">' + $label.text() + '</option>');
+            $select.append($option);
+
+            return false;
+        })
+    });
+}
\ No newline at end of file
diff --git a/htdocs/settings.js b/htdocs/settings.js
index 4a9903b..30aacad 100644
--- a/htdocs/settings.js
+++ b/htdocs/settings.js
@@ -5,4 +5,5 @@ $(function(){
     $('.wsjt-decoding-depths').wsjtDecodingDepthsInput();
     $('#waterfall_scheme').waterfallDropdown();
     $('#rf_gain').gainInput();
+    $('.optional-section').optionalSection();
 });
\ No newline at end of file
diff --git a/owrx/controllers/assets.py b/owrx/controllers/assets.py
index f090fb6..696d541 100644
--- a/owrx/controllers/assets.py
+++ b/owrx/controllers/assets.py
@@ -151,6 +151,7 @@ class CompiledAssetsController(GzipMixin, ModificationAwareController):
             "lib/settings/WsjtDecodingDepthsInput.js",
             "lib/settings/WaterfallDropdown.js",
             "lib/settings/GainInput.js",
+            "lib/settings/OptionalSection.js",
             "settings.js",
         ],
     }
diff --git a/owrx/controllers/settings/__init__.py b/owrx/controllers/settings/__init__.py
index 11f056c..12d8b09 100644
--- a/owrx/controllers/settings/__init__.py
+++ b/owrx/controllers/settings/__init__.py
@@ -10,19 +10,25 @@ class Section(object):
         self.title = title
         self.inputs = inputs
 
+    def render_input(self, input, data):
+        return input.render(data)
+
     def render_inputs(self, data):
-        return "".join([i.render(data) for i in self.inputs])
+        return "".join([self.render_input(i, data) for i in self.inputs])
+
+    def classes(self):
+        return ["col-12", "settings-section"]
 
     def render(self, data):
         return """
-            <div class="col-12 settings-section">
+            <div class="{classes}">
                 <h3 class="settings-header">
                     {title}
                 </h3>
                 {inputs}
             </div>
         """.format(
-            title=self.title, inputs=self.render_inputs(data)
+            classes=" ".join(self.classes()), title=self.title, inputs=self.render_inputs(data)
         )
 
     def parse(self, data):
diff --git a/owrx/controllers/settings/sdr.py b/owrx/controllers/settings/sdr.py
index 90bb131..926001e 100644
--- a/owrx/controllers/settings/sdr.py
+++ b/owrx/controllers/settings/sdr.py
@@ -71,7 +71,7 @@ class SdrDeviceController(SettingsFormController):
     def getSections(self):
         try:
             description = SdrDeviceDescription.getByType(self.device["type"])
-            return [description.getSection(self.device)]
+            return [description.getSection()]
         except SdrDeviceDescriptionMissing:
             # TODO provide a generic interface that allows to switch the type
             return []
diff --git a/owrx/form/__init__.py b/owrx/form/__init__.py
index fbbbc42..8a88b5d 100644
--- a/owrx/form/__init__.py
+++ b/owrx/form/__init__.py
@@ -6,11 +6,19 @@ from enum import Enum
 
 
 class Input(ABC):
-    def __init__(self, id, label, infotext=None, converter: Converter = None):
+    def __init__(self, id, label, infotext=None, converter: Converter = None, disabled=False, removable=False):
         self.id = id
         self.label = label
         self.infotext = infotext
         self.converter = self.defaultConverter() if converter is None else converter
+        self.disabled = disabled
+        self.removable = removable
+
+    def setDisabled(self, disabled=True):
+        self.disabled = disabled
+
+    def setRemovable(self, removable=True):
+        self.removable = removable
 
     def defaultConverter(self):
         return NullConverter()
@@ -18,23 +26,47 @@ class Input(ABC):
     def bootstrap_decorate(self, input):
         infotext = "<small>{text}</small>".format(text=self.infotext) if self.infotext else ""
         return """
-            <div class="form-group row">
+            <div class="form-group row" data-field="{id}">
                 <label class="col-form-label col-form-label-sm col-3" for="{id}">{label}</label>
-                <div class="col-9 p-0">
-                    {input}
-                    {infotext}
+                <div class="col-9 p-0 removable-group {removable}">
+                    <div class="removeable-item">
+                        {input}
+                        {infotext}
+                    </div>
+                    {removebutton}
                 </div>
             </div>
         """.format(
-            id=self.id, label=self.label, input=input, infotext=infotext
+            id=self.id,
+            label=self.label,
+            input=input,
+            infotext=infotext,
+            removable="removable" if self.removable else "",
+            removebutton='<button class="btn btn-sm btn-danger option-remove-button">Remove</button>'
+            if self.removable
+            else "",
         )
 
     def input_classes(self):
         return " ".join(["form-control", "form-control-sm"])
 
-    @abstractmethod
+    def input_properties(self, value):
+        props = {
+            "class": self.input_classes(),
+            "id": self.id,
+            "name": self.id,
+            "placeholder": self.label,
+            "value": value,
+        }
+        if self.disabled:
+            props["disabled"] = "disabled"
+        return props
+
+    def render_input_properties(self, value):
+        return " ".join('{}="{}"'.format(prop, value) for prop, value in self.input_properties(value).items())
+
     def render_input(self, value):
-        pass
+        return "<input {properties} />".format(properties=self.render_input_properties(value))
 
     def render(self, config):
         value = config[self.id] if self.id in config else None
@@ -43,14 +75,15 @@ class Input(ABC):
     def parse(self, data):
         return {self.id: self.converter.convert_from_form(data[self.id][0])} if self.id in data else {}
 
+    def getLabel(self):
+        return self.label
+
 
 class TextInput(Input):
-    def render_input(self, value):
-        return """
-            <input type="text" class="{classes}" id="{id}" name="{id}" placeholder="{label}" value="{value}">
-        """.format(
-            id=self.id, label=self.label, classes=self.input_classes(), value=value
-        )
+    def input_properties(self, value):
+        props = super().input_properties(value)
+        props["type"] = "text"
+        return props
 
 
 class NumberInput(Input):
@@ -62,6 +95,13 @@ class NumberInput(Input):
     def defaultConverter(self):
         return IntConverter()
 
+    def input_properties(self, value):
+        props = super().input_properties(value)
+        props["type"] = "number"
+        if self.step:
+            props["step"] = self.step
+        return props
+
     def render_input(self, value):
         if self.append:
             append = """
@@ -76,15 +116,11 @@ class NumberInput(Input):
 
         return """
             <div class="input-group input-group-sm">
-                <input type="number" class="{classes}" id="{id}" name="{id}" placeholder="{label}" value="{value}" {step}>
+                {input}
                 {append}
             </div>
         """.format(
-            id=self.id,
-            label=self.label,
-            classes=self.input_classes(),
-            value=value,
-            step='step="{0}"'.format(self.step) if self.step else "",
+            input=super().render_input(value),
             append=append,
         )
 
@@ -116,13 +152,15 @@ class LocationInput(Input):
     def render_sub_input(self, value, id):
         return """
             <div class="col">
-                <input type="number" class="{classes}" id="{id}" name="{id}" placeholder="{label}" value="{value}" step="any">
+                <input type="number" class="{classes}" id="{id}" name="{id}" placeholder="{label}" value="{value}"
+                step="any" {disabled}>
             </div>
         """.format(
             id="{0}-{1}".format(self.id, id),
             label=self.label,
             classes=self.input_classes(),
             value=value[id],
+            disabled="disabled" if self.disabled else "",
         )
 
     def parse(self, data):
@@ -132,9 +170,9 @@ class LocationInput(Input):
 class TextAreaInput(Input):
     def render_input(self, value):
         return """
-            <textarea class="{classes}" id="{id}" name="{id}" style="height:200px;">{value}</textarea>
+            <textarea class="{classes}" id="{id}" name="{id}" style="height:200px;" {disabled}>{value}</textarea>
         """.format(
-            id=self.id, classes=self.input_classes(), value=value
+            id=self.id, classes=self.input_classes(), value=value, disabled="disabled" if self.disabled else ""
         )
 
 
@@ -145,16 +183,17 @@ class CheckboxInput(Input):
 
     def render_input(self, value):
         return """
-          <div class="{classes}">
-            <input class="form-check-input" type="checkbox" id="{id}" name="{id}" {checked}>
-            <label class="form-check-label" for="{id}">
-              {checkboxText}
-            </label>
-          </div>
+            <div class="{classes}">
+                <input class="form-check-input" type="checkbox" id="{id}" name="{id}" {checked} {disabled}>
+                <label class="form-check-label" for="{id}">
+                    {checkboxText}
+                </label>
+            </div>
         """.format(
             id=self.id,
             classes=self.input_classes(),
             checked="checked" if value else "",
+            disabled="disabled" if self.disabled else "",
             checkboxText=self.checkboxText,
         )
 
@@ -164,6 +203,9 @@ class CheckboxInput(Input):
     def parse(self, data):
         return {self.id: self.converter.convert_from_form(self.id in data and data[self.id][0] == "on")}
 
+    def getLabel(self):
+        return self.checkboxText
+
 
 class Option(object):
     # used for both MultiCheckboxInput and DropdownInput
@@ -186,7 +228,7 @@ class MultiCheckboxInput(Input):
     def render_checkbox(self, option, value):
         return """
           <div class="{classes}">
-            <input class="form-check-input" type="checkbox" id="{id}" name="{id}" {checked}>
+            <input class="form-check-input" type="checkbox" id="{id}" name="{id}" {checked} {disabled}>
             <label class="form-check-label" for="{id}">
               {checkboxText}
             </label>
@@ -196,6 +238,7 @@ class MultiCheckboxInput(Input):
             classes=self.input_classes(),
             checked="checked" if option.value in value else "",
             checkboxText=option.text,
+            disabled="disabled" if self.disabled else "",
         )
 
     def parse(self, data):
@@ -242,9 +285,12 @@ class DropdownInput(Input):
 
     def render_input(self, value):
         return """
-            <select class="{classes}" id="{id}" name="{id}">{options}</select>
+            <select class="{classes}" id="{id}" name="{id}" {disabled}>{options}</select>
         """.format(
-            classes=self.input_classes(), id=self.id, options=self.render_options(value)
+            classes=self.input_classes(),
+            id=self.id,
+            options=self.render_options(value),
+            disabled="disabled" if self.disabled else "",
         )
 
     def render_options(self, value):
diff --git a/owrx/form/device.py b/owrx/form/device.py
index cd987f1..d1c0c92 100644
--- a/owrx/form/device.py
+++ b/owrx/form/device.py
@@ -16,12 +16,12 @@ class GainInput(Input):
 
         return """
             <div id="{id}">
-                <select class="{classes}" id="{id}-select" name="{id}-select">
+                <select class="{classes}" id="{id}-select" name="{id}-select" {disabled}>
                     {options}
                 </select>
                 <div class="option manual" style="display: none;">
                     <input type="number" id="{id}-manual" name="{id}-manual" value="{value}" class="{classes}"
-                    placeholder="Manual device gain" step="any">
+                    placeholder="Manual device gain" step="any" {disabled}>
                 </div>
                 {stageoption}
             </div>
@@ -32,6 +32,7 @@ class GainInput(Input):
             label=self.label,
             options=self.render_options(value),
             stageoption="" if self.gain_stages is None else self.render_stage_option(value),
+            disabled="disabled" if self.disabled else ""
         )
 
     def render_options(self, value):
@@ -79,15 +80,16 @@ class GainInput(Input):
             inputs="".join(
                 """
                     <div class="row">
-                        <div class="col-3">{stage}</div>
+                        <label class="col-form-label col-form-label-sm col-3">{stage}</label>
                         <input type="number" id="{id}-{stage}" name="{id}-{stage}" value="{value}"
-                        class="col-9 {classes}" placeholder="{stage}" step="any">
+                        class="col-9 {classes}" placeholder="{stage}" step="any" {disabled}>
                     </div>
                 """.format(
                     id=self.id,
                     stage=stage,
                     value=value_dict[stage] if stage in value_dict else "",
                     classes=self.input_classes(),
+                    disabled="disabled" if self.disabled else "",
                 )
                 for stage in self.gain_stages
             )
diff --git a/owrx/form/wsjt.py b/owrx/form/wsjt.py
index a5e1af0..215b1b7 100644
--- a/owrx/form/wsjt.py
+++ b/owrx/form/wsjt.py
@@ -22,7 +22,7 @@ class Q65ModeMatrix(Input):
             id=self.checkbox_id(mode, interval),
             checked="checked" if "{}{}".format(mode.name, interval.value) in value else "",
             checkboxText="Mode {} interval {}s".format(mode.name, interval.value),
-            disabled="" if interval.is_available(mode) else "disabled",
+            disabled="" if interval.is_available(mode) and not self.disabled else "disabled",
         )
 
     def render_input(self, value):
@@ -69,7 +69,7 @@ class WsjtDecodingDepthsInput(Input):
             )
 
         return """
-            <input type="hidden" class="{classes}" id="{id}" name="{id}" value="{value}">
+            <input type="hidden" class="{classes}" id="{id}" name="{id}" value="{value}" {disabled}>
             <div class="inputs" style="display:none;">
                 <select class="form-control form-control-sm">{options}</select>
                 <input class="form-control form-control-sm" type="number" step="1">
@@ -79,6 +79,7 @@ class WsjtDecodingDepthsInput(Input):
             classes=self.input_classes(),
             value=html.escape(value),
             options="".join(render_mode(m) for m in Modes.getAvailableModes() if isinstance(m, WsjtMode)),
+            disabled="disabled" if self.disabled else ""
         )
 
     def input_classes(self):
diff --git a/owrx/source/__init__.py b/owrx/source/__init__.py
index 46be223..435fd41 100644
--- a/owrx/source/__init__.py
+++ b/owrx/source/__init__.py
@@ -375,10 +375,76 @@ class SdrDeviceDescriptionMissing(Exception):
     pass
 
 
-class SdrDeviceDescription(object):
-    def __init__(self):
-        self.indexedInputs = {input.id: input for input in self.getInputs()}
+class OptionalSection(Section):
+    def __init__(self, title, inputs: List[Input], mandatory, optional):
+        super().__init__(title, *inputs)
+        self.mandatory = mandatory
+        self.optional = optional
+        self.optional_inputs = []
 
+    def classes(self):
+        classes = super().classes()
+        classes.append("optional-section")
+        return classes
+
+    def _is_optional(self, input):
+        return input.id in self.optional
+
+    def render_optional_select(self):
+        return """
+            <div class="form-group row">
+                <label class="col-form-label col-form-label-sm col-3">
+                    Additional optional settings
+                </label>
+                <div class="input-group input-group-sm col-9 p-0">
+                    <select class="form-control from-control-sm optional-select">
+                        {options}
+                    </select>
+                    <div class="input-group-append">
+                        <button class="btn btn-success option-add-button">Add</button>
+                    </div>
+                </div>
+            </div>
+        """.format(
+            options="".join(
+                """
+                    <option value="{value}">{name}</option>
+                """.format(
+                    value=input.id,
+                    name=input.getLabel(),
+                )
+                for input in self.optional_inputs
+            )
+        )
+
+    def render_optional_inputs(self, data):
+        return """
+            <div class="optional-inputs" style="display: none;">
+                {inputs}
+            </div>
+        """.format(
+            inputs="".join(self.render_input(input, data) for input in self.optional_inputs)
+        )
+
+    def render_inputs(self, data):
+        return super().render_inputs(data) + self.render_optional_select() + self.render_optional_inputs(data)
+
+    def render(self, data):
+        indexed_inputs = {input.id: input for input in self.inputs}
+        visible_keys = set(self.mandatory + [k for k in self.optional if k in data])
+        optional_keys = set(k for k in self.optional if k not in data)
+        self.inputs = [input for k, input in indexed_inputs.items() if k in visible_keys]
+        for input in self.inputs:
+            if self._is_optional(input):
+                input.setRemovable()
+        self.optional_inputs = [input for k, input in indexed_inputs.items() if k in optional_keys]
+        for input in self.optional_inputs:
+            input.setRemovable()
+            input.setDisabled()
+        return super().render(data)
+
+
+class SdrDeviceDescription(object):
     @staticmethod
     def getByType(sdr_type: str) -> "SdrDeviceDescription":
         try:
@@ -407,7 +473,6 @@ class SdrDeviceDescription(object):
             ),
             CheckboxInput(
                 "services",
-                "",
                 "Run background services on this device",
                 converter=OptionalConverter(defaultFormValue=True),
             ),
@@ -431,8 +496,5 @@ class SdrDeviceDescription(object):
     def getOptionalKeys(self):
         return ["ppm", "always-on", "services", "rf_gain", "lfo_offset", "waterfall_min_level", "waterfall_max_level"]
 
-    def getSection(self, data):
-        visible_keys = set(self.getMandatoryKeys() + [k for k in self.getOptionalKeys() if k in data])
-        inputs = [input for k, input in self.indexedInputs.items() if k in visible_keys]
-        # TODO: render remaining keys in optional area
-        return Section("Device settings", *inputs)
+    def getSection(self):
+        return OptionalSection("Device settings", self.getInputs(), self.getMandatoryKeys(), self.getOptionalKeys())