> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cadmus-cad.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Settings and display

> MDT settings beyond voice alerts and training mode.

MDT settings beyond voice alerts and training mode.

## Voice and assignment alerts

**Voice Alerts** (Settings):

| Control                         | Effect                                                    |
| ------------------------------- | --------------------------------------------------------- |
| **Incoming call alerts** toggle | Speaks your custom phrase when a **new** call is assigned |
| **Custom phrase**               | Text spoken for new assignments (e.g. “You have a call.”) |

When speech is off or the app is backgrounded, Android may show a **Call Assignments** notification instead. See [Voice alerts](/mobile/voice-alerts).

<Note>Screenshot placeholder: Voice Alerts section in Settings</Note>

## Display mode

**SYSTEM CONFIGURATION** → **DISPLAY MODE**

| Mode                 | Use                                 |
| -------------------- | ----------------------------------- |
| **Normal**           | Standard colors                     |
| **Night Vision**     | Reduced glare for night patrol      |
| **Monitor Blackout** | Minimal screen output when required |

<Note>Screenshot placeholder: Display mode selector</Note>

## Hardware and peripherals

**HARDWARE & PERIPHERALS** lists printers available to the device (including Bluetooth printers already paired with the OS).

| Control         | Purpose                             |
| --------------- | ----------------------------------- |
| **Refresh**     | Reload the system printer list      |
| **TEST 4″**     | Send a 4″ × 8″ thermal test page    |
| **TEST LETTER** | Send an 8.5″ × 11″ letter test page |

Select a printer in the list, then run a test. If no printers appear, pair the printer in Android Bluetooth / print settings and refresh — or use a test button to open the system print dialog.

App version is shown at the bottom of this section.

<Note>Screenshot placeholder: System printer list and test print buttons</Note>

## Location services

**LOCATION SERVICES** controls GPS permissions and manual start/stop for **handheld** officer tracking.

| Control              | Purpose                                         |
| -------------------- | ----------------------------------------------- |
| Permission status    | Shows whether the app can read GPS              |
| **Start** / **Stop** | Begin or end person location updates (handheld) |
| Accuracy readout     | Current fix quality when tracking is active     |

<Note>
  On **desktop MDT** and **activated apparatus tablets**, location tracking for the unit starts automatically when you are signed in (or the device session is active). The Settings start/stop buttons apply to handheld person tracking; apparatus tablets fall back to the enrolled **unit id** when no officer profile is present.
</Note>

See [Map and navigation](/mobile/map-and-navigation) for how MDT vs phone tracking appears on the map.

<Frame caption="**TODO — screenshot:** Settings → **LOCATION SERVICES** — permission chip, **Start** / **Stop**, and accuracy readout on a handheld device.">
  <img src="https://mintlify.s3.us-west-1.amazonaws.com/cadmus-d41dc7ee/images/mobile/location/settings-location-services.png" alt="Settings Location services section with start stop and permission status" />
</Frame>

## Application updates (Windows MDT)

On Windows production builds, MDT checks for signed updates when you start the app and about every four hours while it stays open and online.

* Open **Updates** from the sidebar to read release notes and see download progress.
* When the chip shows **Update ready — restart to install**, choose **Restart to update** or close and reopen the app.
* The installer runs on restart and relaunches MDT with the new version.

Updates are verified before installation. Offline or slow networks may delay download; the previous version remains usable until a verified update is staged.

## Synchronization

**SYNCHRONIZATION** section:

* **Auto-Sync Ticket Data** (e-citations)
* **CHECK UPDATES** / violation DB updates

<Note>Screenshot placeholder: Synchronization settings</Note>

## Application updates (Windows MDT)

On **Windows** MDT builds with auto-update enabled:

| Control                                                                | Effect                                                                                                                                                                          |
| ---------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Automatically download updates**                                     | Off by default. When off, Cadmus checks for updates in the background and asks before downloading. When on, updates download quietly, then Cadmus still asks before installing. |
| **Check for updates** / **Download & install** / **Restart to update** | Manual control from Settings                                                                                                                                                    |
| **Later**                                                              | Postpone the prompt for 24 hours and keep using the current version                                                                                                             |

Install always requires confirmation. If Windows asks for administrator approval and you cancel, you can keep working on the current version and retry later.

## Feedback

Sidebar or settings **FEEDBACK** — report issues to product team.

## Related guides

* [Voice alerts](/mobile/voice-alerts)
* [Training mode](/mobile/training-mode)
* [Connectivity and offline](/mobile/connectivity-offline)
* [Map and navigation](/mobile/map-and-navigation)

## Tips

* Set display mode once per shift type (day vs night).
* Pair the thermal printer in system settings, then run **TEST 4″** before the first citation stop.
* Run **CHECK UPDATES** after admin pushes new violation codes.

## Warnings

<Warning>Monitor blackout may hide critical alerts — use only per SOP.</Warning>