diff --git a/src/openflexure_microscope_server/things/scan_workflows.py b/src/openflexure_microscope_server/things/scan_workflows.py
index e8ec3e00..7b10cbff 100644
--- a/src/openflexure_microscope_server/things/scan_workflows.py
+++ b/src/openflexure_microscope_server/things/scan_workflows.py
@@ -295,13 +295,13 @@ class HistoScanWorkflow(RectGridWorkflow[HistoScanSettingsModel]):
 
     # Stacking settings
 
-    stack_images_to_save: int = lt.setting(default=1)
+    stack_images_to_save: int = lt.setting(default=1, ge=1, le=9)
     """The number of images to save in a stack.
 
     Defaults to 1 unless you need to see either side of focus
     """
 
-    stack_min_images_to_test: int = lt.setting(default=9)
+    stack_min_images_to_test: int = lt.setting(default=9, ge=5, le=13)
     """The minimum number of images to capture in a stack.
 
     This many images are captures and tested for focus, if the focus is not central
@@ -311,7 +311,7 @@ class HistoScanWorkflow(RectGridWorkflow[HistoScanSettingsModel]):
     Defaults to 9 which balances reliability and speed.
     """
 
-    stack_dz: int = lt.setting(default=50)
+    stack_dz: int = lt.setting(default=50, ge=10, le=400)
     """Distance in steps between images in a z-stack.
 
     Suggested values:
@@ -538,7 +538,9 @@ class HistoScanWorkflow(RectGridWorkflow[HistoScanSettingsModel]):
     def settings_ui(self) -> list[PropertyControl]:
         """A list of PropertyControl objects to create the settings in the scan tab."""
         return [
-            property_control_for(self, "overlap", label="Image Overlap (0.1-0.7)"),
+            property_control_for(
+                self, "overlap", label="Image Overlap (0.1-0.7)", step=0.05
+            ),
             property_control_for(
                 self, "stack_images_to_save", label="Images in Stack to Save"
             ),
@@ -547,9 +549,13 @@ class HistoScanWorkflow(RectGridWorkflow[HistoScanSettingsModel]):
                 "stack_min_images_to_test",
                 label="Minimum number of images to test for focus",
             ),
-            property_control_for(self, "stack_dz", label="Stack dz (steps)"),
-            property_control_for(self, "autofocus_dz", label="Autofocus Range (steps)"),
-            property_control_for(self, "max_range", label="Maximum Distance (steps)"),
+            property_control_for(self, "stack_dz", label="Stack dz (steps)", step=5),
+            property_control_for(
+                self, "autofocus_dz", label="Autofocus Range (steps)", step=200
+            ),
+            property_control_for(
+                self, "max_range", label="Maximum Distance (steps)", step=1000
+            ),
             property_control_for(
                 self, "skip_background", label="Detect and Skip Empty Fields "
             ),
@@ -662,7 +668,9 @@ class RegularGridWorkflow(RectGridWorkflow[RegularGridSettingsModel]):
     def settings_ui(self) -> list[PropertyControl]:
         """A list of PropertyControl objects to create the settings in the scan tab."""
         return [
-            property_control_for(self, "overlap", label="Image Overlap (0.1-0.7)"),
+            property_control_for(
+                self, "overlap", label="Image Overlap (0.1-0.7)", step=0.05
+            ),
             property_control_for(self, "x_count", label="Number of columns"),
             property_control_for(self, "y_count", label="Number of rows"),
             property_control_for(self, "autofocus_dz", label="Autofocus Range (steps)"),
diff --git a/src/openflexure_microscope_server/ui.py b/src/openflexure_microscope_server/ui.py
index 4347fbbd..3cb4375e 100644
--- a/src/openflexure_microscope_server/ui.py
+++ b/src/openflexure_microscope_server/ui.py
@@ -97,6 +97,16 @@ class PropertyControl(BaseModel):
     when selected.
     """
 
+    step: Optional[int | float] = None
+    """The step size for a numerical input.
+
+    If the property is not numeric this will be ignored.
+
+    If this is left as None, then the UI will try to use the ``multipleOf`` field in
+    the property dataSchema. If ``multipleOf`` is not set then the browser default is
+    used.
+    """
+
 
 def property_control_for(
     thing: lt.Thing, property_name: str, **kwargs: Any
diff --git a/webapp/src/components/labThingsComponents/inputFromSchema.vue b/webapp/src/components/labThingsComponents/inputFromSchema.vue
index e4cbe260..3b726b29 100644
--- a/webapp/src/components/labThingsComponents/inputFromSchema.vue
+++ b/webapp/src/components/labThingsComponents/inputFromSchema.vue
@@ -5,7 +5,7 @@
       <div class="input-and-buttons-container">
         <select
           v-model="internalValue"
-          class="uk-form-small numeric-setting-line-input dropdown"
+          class="uk-form-small property-input dropdown"
           @change="sendValue"
         >
           <option v-for="(value, display) in options" :key="value" :value="value">
@@ -18,23 +18,31 @@
     <label v-if="!useDropdown && dataType == 'number'" class="uk-form-label"
       >{{ label }}
       <div class="input-and-buttons-container">
-        <input
-          ref="numericalInput"
-          v-model="internalValue"
-          class="uk-form-small numeric-setting-line-input"
-          :class="{ edited: isEdited, flash: animateUpdate }"
-          :disabled="isDisabled"
-          type="number"
-          @input="grabFocus"
-          @focusout="focusOut"
-          @keydown="keyDown"
-          @animationend="animationEnd"
-        />
+        <div class="uk-inline number-wrapper">
+          <input
+            ref="numericalInput"
+            v-model="internalValue"
+            class="uk-form-small property-input numeric-property"
+            :class="{ edited: isEdited, flash: animateUpdate }"
+            :disabled="isDisabled"
+            type="number"
+            :min="minimum"
+            :max="maximum"
+            @input="grabFocus"
+            @focusout="focusOut"
+            @keydown="keyDown"
+            @animationend="animationEnd"
+          />
+          <div class="spinner-buttons">
+            <button type="button" @click="increment(1)" @mousedown="spinnerClick">▲</button>
+            <button type="button" @click="increment(-1)" @mousedown="spinnerClick">▼</button>
+          </div>
+        </div>
         <sync-property-button @click="requestUpdate" />
       </div>
     </label>
     <div v-if="!useDropdown && dataType == 'boolean'" class="input-and-buttons-container">
-      <label class="uk-form-label numeric-setting-line-input">
+      <label class="uk-form-label property-input">
         <input
           ref="checkbox"
           v-model="internalValue"
@@ -54,7 +62,7 @@
           v-for="i in valueLength"
           :key="i"
           v-model="internalValue[i - 1]"
-          class="uk-form-small numeric-setting-line-input"
+          class="uk-form-small property-input"
           :class="{ edited: isEdited, flash: animateUpdate }"
           :disabled="isDisabled"
           type="number"
@@ -73,7 +81,7 @@
         <div class="input-and-buttons-container">
           <input
             v-model="internalValue[key]"
-            class="uk-form-small numeric-setting-line-input"
+            class="uk-form-small property-input"
             :class="{ edited: isEdited, flash: animateUpdate }"
             :disabled="isDisabled"
             type="number"
@@ -91,7 +99,7 @@
       <div class="input-and-buttons-container">
         <input
           v-model="internalValue"
-          class="uk-form-small numeric-setting-line-input"
+          class="uk-form-small property-input"
           :class="{ edited: isEdited, flash: animateUpdate }"
           :disabled="isDisabled"
           type="text"
@@ -107,7 +115,7 @@
       <div class="input-and-buttons-container">
         <input
           v-model="internalValue"
-          class="uk-form-small numeric-setting-line-input"
+          class="uk-form-small property-input"
           type="text"
           disabled="true"
         />
@@ -149,6 +157,11 @@ export default {
       default: null,
       required: false,
     },
+    step: {
+      type: Number,
+      default: null,
+      required: false,
+    },
   },
 
   emits: ["requestUpdate", "sendValue", "animationShown"],
@@ -242,6 +255,27 @@ export default {
       }
       return "other";
     },
+    maximum() {
+      if (this.dataType !== "number") return undefined;
+      return this.dataSchema.maximum;
+    },
+    minimum() {
+      if (this.dataType !== "number") return undefined;
+      return this.dataSchema.minimum;
+    },
+    /**
+     * The step size for numerical spinners.
+     *
+     * If not a number this is `undefined`. If `step` is set as a prop then it is used
+     * otherwise `multipleOf` from the property `dataSchema` is used. If `multipleOf`
+     * is not set in the `dataSchema` JS will return `undefined` and the browser will
+     * use its default value.
+     */
+    spinner_step() {
+      if (this.dataType !== "number") return undefined;
+      if (this.step !== null) return this.step;
+      return this.dataSchema.multipleOf;
+    },
   },
 
   watch: {
@@ -292,6 +326,37 @@ export default {
         this.sendValue();
       }
     },
+    increment(sign) {
+      const step = this.spinner_step || 1;
+      const multipleOf = this.dataSchema.multipleOf;
+      let newValue = Number(this.internalValue) || 0;
+      newValue += sign * step;
+      // Apply minimum if defined
+      if (this.minimum !== undefined && this.minimum !== null) {
+        newValue = Math.max(newValue, this.minimum);
+      }
+      // Apply maximum if defined
+      if (this.maximum !== undefined && this.maximum !== null) {
+        newValue = Math.min(newValue, this.maximum);
+      }
+
+      // If mulipleOf is validated on server then enforce it.
+      if (multipleOf) {
+        newValue = Math.round(newValue / multipleOf) * multipleOf;
+      }
+
+      // Rounding to about 5 sig figs to stop weird javascript rounding.
+      const magnitude = Math.floor(Math.log10(Math.abs(newValue)));
+      const factor = 10 ** -(Math.floor(magnitude) - 4);
+      this.internalValue = Math.round(newValue * factor) / factor;
+    },
+    /**
+     * Grab focus for the numerical input when a spinner is clicked.
+     */
+    spinnerClick(event) {
+      event.preventDefault();
+      this.$refs.numericalInput.focus();
+    },
     /** Grab the browser focus.
      *
      * This is needed for numerical elements to be in focus when a spinner
@@ -312,6 +377,17 @@ export default {
       if (event.keyCode == 13) {
         this.sendValue();
       }
+      // If numeric then capture Up and Down keys for incrementing.
+      if (this.dataType === "number") {
+        if (event.key === "ArrowUp") {
+          event.preventDefault();
+          this.increment(1);
+        }
+        if (event.key === "ArrowDown") {
+          event.preventDefault();
+          this.increment(-1);
+        }
+      }
     },
     updateIsEdited: function () {
       this.isEdited =
@@ -349,12 +425,50 @@ export default {
   align-items: center;
   width: 100%;
 }
-.numeric-setting-line-input {
+.property-input {
   flex-grow: 1;
   margin-left: 5px;
   margin-right: 5px;
   width: 6em;
 }
+/*Hide standard spinners as it isn't possible to customise the browser ones.*/
+.numeric-property {
+  -moz-appearance: textfield;
+}
+.numeric-property::-webkit-outer-spin-button,
+.numeric-property::-webkit-inner-spin-button {
+  -webkit-appearance: none;
+}
+
+.number-wrapper {
+  display: flex;
+  flex-flow: row wrap;
+  justify-content: flex-start;
+  align-content: stretch;
+  align-items: center;
+  flex-grow: 1;
+}
+
+.spinner-buttons {
+  position: absolute;
+  right: 4px;
+  top: 1px;
+  bottom: 5px;
+  display: flex;
+  flex-direction: column;
+  justify-content: space-between;
+}
+
+.spinner-buttons button {
+  height: 45%;
+  padding: 0 6px;
+  line-height: 1;
+  font-size: 10px;
+  border: none;
+  background: transparent;
+  cursor: pointer;
+  color: #888;
+}
 .dropdown {
   background-color: #fff;
   border: 1px solid #ccc;
diff --git a/webapp/src/components/labThingsComponents/propertyControl.vue b/webapp/src/components/labThingsComponents/propertyControl.vue
index cbf4dd28..8c1ae576 100644
--- a/webapp/src/components/labThingsComponents/propertyControl.vue
+++ b/webapp/src/components/labThingsComponents/propertyControl.vue
@@ -5,6 +5,7 @@
     :label="label"
     :animate="animate"
     :options="options"
+    :step="step"
     @request-update="readProperty"
     @send-value="writeProperty"
     @animation-shown="resetAnimate"
@@ -50,6 +51,11 @@ export default {
       default: null,
       required: false,
     },
+    step: {
+      type: Number,
+      default: null,
+      required: false,
+    },
   },
 
   data() {
diff --git a/webapp/src/components/labThingsComponents/serverSpecifiedPropertyControl.vue b/webapp/src/components/labThingsComponents/serverSpecifiedPropertyControl.vue
index 807ec039..9b3e240a 100644
--- a/webapp/src/components/labThingsComponents/serverSpecifiedPropertyControl.vue
+++ b/webapp/src/components/labThingsComponents/serverSpecifiedPropertyControl.vue
@@ -7,6 +7,7 @@
     :read-back="propertyData.read_back"
     :read-back-delay="propertyData.read_back_delay"
     :options="propertyData.options"
+    :step="propertyData.step"
   />
 </template>