diff --git a/src/openflexure_microscope_server/background_detect.py b/src/openflexure_microscope_server/background_detect.py
index 7773eb93..4941054f 100644
--- a/src/openflexure_microscope_server/background_detect.py
+++ b/src/openflexure_microscope_server/background_detect.py
@@ -8,7 +8,7 @@ current camera field of view contains sample.
 from typing import Optional, Any
 import cv2
 import numpy as np
-from pydantic import BaseModel
+from pydantic import BaseModel, Field, ConfigDict
 from pydantic.errors import PydanticUserError
 from scipy.stats import norm
 from labthings_fastapi.thing_description import type_to_dataschema
@@ -153,13 +153,18 @@ class ChannelDistributions(BaseModel):
 class ColourChannelDetectSettings(BaseModel):
     """A BaseModel for storing the settings for colour channel detectors."""
 
+    model_config = ConfigDict(extra="forbid")
+
     channel_tolerance: float = 7.0
     """Channel Tolerance
 
     The number of standard deviations a pixel value must be from the background mean
     to be considered sample.
     """
-    min_sample_coverage: float = 25.0
+
+    # Use Field to set Title reported to UI. By default Pydantic will convert the name
+    # from snake_case to Title Case.
+    min_sample_coverage: float = Field(25, title="Sample Coverage Required (%)")
     """Sample Coverage Required (%)
 
     The minimum percentage of the image that needs to be identified as sample for the
diff --git a/src/openflexure_microscope_server/things/camera/__init__.py b/src/openflexure_microscope_server/things/camera/__init__.py
index fcccaae8..80f46b55 100644
--- a/src/openflexure_microscope_server/things/camera/__init__.py
+++ b/src/openflexure_microscope_server/things/camera/__init__.py
@@ -516,6 +516,20 @@ class BaseCamera(lt.Thing):
         """The status of the active detector for the UI."""
         return self.active_detector.status
 
+    @lt.thing_action
+    def update_detector_settings(self, data) -> None:
+        """Update the settings of the current detector.
+
+        This is an action not a setting/property as the data model depends on the
+        selected detector. As such, it cannot be specified with the necessary precision
+        to be included in a ThingDescription as a setting/property, while retaining
+        enough useful information to communicate to the UI how it is set and read.
+
+        The information on how to read the settings is exposed in
+        ``background_detector_status``.
+        """
+        self.active_detector.settings = data
+
     @lt.thing_setting
     def background_detector_data(self) -> dict:
         """The data for each background detector, used to save to disk."""
diff --git a/webapp/src/components/labThingsComponents/inputFromSchema.vue b/webapp/src/components/labThingsComponents/inputFromSchema.vue
index e1463507..32f78f63 100644
--- a/webapp/src/components/labThingsComponents/inputFromSchema.vue
+++ b/webapp/src/components/labThingsComponents/inputFromSchema.vue
@@ -51,20 +51,21 @@
     </label>
     <label v-if="dataType == 'number_object'" class="uk-form-label"
       >{{ label }}
-      <div class="input-and-buttons-container">
-        <input
-          v-for="(_v, key) in value"
-          :key="key"
-          v-model="internalValue[key]"
-          class="uk-form-small numeric-setting-line-input"
-          type="number"
-          @focusin="focusIn"
-          @focusout="focusOut"
-          @keydown="keyDown"
-        />
-        <a class="button-next-to-input" @click="requestUpdate">
-          <span class="material-symbols-outlined">refresh</span>
-        </a>
+      <div v-for="(val, key) in value" :key="key">
+        <label>{{internalLabels[key]}}</label>
+        <div class="input-and-buttons-container" >
+          <input
+            v-model="internalValue[key]"
+            class="uk-form-small numeric-setting-line-input"
+            type="number"
+            @focusin="focusIn"
+            @focusout="focusOut"
+            @keydown="keyDown"
+          />
+          <a class="button-next-to-input" @click="requestUpdate">
+            <span class="material-symbols-outlined">refresh</span>
+          </a>
+        </div>
       </div>
     </label>
     <label v-if="dataType == 'other'" class="uk-form-label"
@@ -112,6 +113,16 @@ export default {
     }
   },
   computed: {
+    internalLabels: function() {
+      if (this.dataType == "number_object") {
+        let labels = {};
+        for (const key in this.internalValue){
+          labels[key] = this.dataSchema.properties[key].title
+        }
+        return labels;
+      }
+      return [];
+    },
     valueLength: function() {
       if (this.dataType == "number_array") {
         if (this.internalValue == undefined) {
diff --git a/webapp/src/components/tabContentComponents/backgroundDetectComponents/paneBackgroundDetect.vue b/webapp/src/components/tabContentComponents/backgroundDetectComponents/paneBackgroundDetect.vue
index 1a9b4df5..e8bf284b 100644
--- a/webapp/src/components/tabContentComponents/backgroundDetectComponents/paneBackgroundDetect.vue
+++ b/webapp/src/components/tabContentComponents/backgroundDetectComponents/paneBackgroundDetect.vue
@@ -10,6 +10,8 @@
               v-model="backgroundDetectorStatus.settings"
               :data-schema="backgroundDetectorStatus.settings_schema"
               label=""
+              @requestUpdate="readSettings"
+              @sendValue="writeSettings"
             />
           </div>
         </li>
@@ -72,6 +74,19 @@ export default {
     alertImageLabel(r) {
       let label = r.output[0] ? "sample" : "background";
       this.modalNotify(`Current image is ${label} (${r.output[1]})`);
+    },
+    readSettings: async function() {
+      this.backgroundDetectorStatus = await this.readThingProperty(
+        "camera",
+        "background_detector_status"
+      );
+    },
+    writeSettings: async function(requestedValue) {
+      await this.invokeAction(
+        "camera",
+        "update_detector_settings",
+        {"data": requestedValue}
+      );
     }
   },
   async created() {
diff --git a/webapp/src/main.js b/webapp/src/main.js
index 0b4eaf52..c259810e 100644
--- a/webapp/src/main.js
+++ b/webapp/src/main.js
@@ -67,6 +67,21 @@ Vue.mixin({
       }
       await axios.put(url, value);
     },
+    async invokeAction(thing, action, data) {
+      let url = this.$store.getters["wot/thingActionUrl"](
+        thing,
+        action,
+        "invokeaction",
+        false
+      );
+      try {
+        let response = await axios.post(url, data);
+        return response;
+      } catch (error) {
+        this.modalError(error);
+        return undefined;
+      }
+    },
     thingActionUrl(thing, action, allow_missing = false) {
       let url = this.$store.getters["wot/thingActionUrl"](
         thing,
@@ -132,7 +147,6 @@ Vue.mixin({
     modalError: function(error) {
       var errormsg = this.getErrorMessage(error);
       this.$store.commit("setErrorMessage", errormsg);
-      console.log("Modal error:", error);
       UIkit.notification({
         message: `${errormsg}`,
         status: "danger"
@@ -140,25 +154,43 @@ Vue.mixin({
     },
 
     getErrorMessage: function(error) {
-      // If a response was obtained, format it nicely and return it
+      // Format the error.
+      let data = this.getErrorData(error)
+      // Get error data may get an object. Handle edge cases and if not try to use
+      // JSON to get the best string. This stops "objectObject" showing as an error.
+      if (data === null) return "null";
+      if (data === undefined) return "undefined";
+      if (typeof data === 'string') return data;
+      try {
+        return JSON.stringify(data, null, 2);
+      } catch (err) {
+        return String(data);
+      }
+    },
+    getErrorData: function(error){
+      // If a response was obtained, extract the most specific message
       if (error.response) {
         // If the response is a nicely formatted JSON response from the server
         if (error.response.data.message) {
-          return `${error.response.data.message}`;
+          return error.response.data.message;
         }
         if (error.response.data.detail) {
-          return `${error.response.data.detail}`;
+          try {
+            return error.response.data.detail[0].msg
+          } catch (err) {
+            return error.response.data.detail;
+          }
         }
         // If the response is just some generic error response
         if (error.response.data) {
-          return `${error.response.data}`;
+          return error.response.data;
         }
-        return `${error.response}`;
+        return error.response;
       }
       // If we have an error object with a message, use that
-      if (error.message) return `${error.message}`;
-      // Otherwise attempt to cast it to a string.
-      return `${error}`;
+      if (error.message) return error.message;
+      // At this point just formatting the whole error object is the best we can do.
+      return error;
     },
 
     showModalElement: function(element) {