ZeroTrace Companion
Appearance Settings
Window behaviour, theme, fullscreen, content protection.
The appearance section controls how Companion's window behaves and looks.
Window behaviour
| Setting | What it does |
|---|---|
| Always on top | Window stays above other application windows |
| Disable resize | Window cannot be resized |
| Start state | Initial window state on launch — normal / minimised / maximised / fullscreen |
Always on top
Useful for monitoring scenarios where Companion needs to stay visible while you work in other applications. The AirLeak live view in always-on-top mode is the canonical use case — keep an eye on alerts while doing other work.
Disable resize
Useful for kiosk-style deployments or when you want a stable layout that doesn't change accidentally. Combined with a fixed start state, you get a predictable display every launch.
Start state
| State | When to use |
|---|---|
| Normal | Default — opens at last saved size and position |
| Minimised | Companion launches in the taskbar without a visible window (useful if you autostart it) |
| Maximised | Always launches fullscreen on the active monitor |
| Fullscreen | Always launches in true fullscreen mode |
Content protection
The content protection enabled toggle prevents Companion's window contents from being captured by:
- Screen-recording software (OBS, screen capture APIs).
- Screenshot tools (built-in OS screenshot, third-party tools).
- Screen sharing (Zoom, Teams, etc.).
When enabled, anyone trying to record or share Companion's window sees a black rectangle where Companion was visible.
Content protection is a defence-in-depth measure, not a guarantee. It relies on operating-system-level features that vary by platform. For high-security environments, treat it as one layer of many — air-gap the machine, control physical access, etc.
This is particularly useful when:
- Demonstrating or training while showing screen but not Companion's specific data.
- Working in shared / public environments.
- Recording how-to videos that should not include real device data.
Theme
Companion ships with dark theme by default. The theme follows the application's overall design — a future release may add light theme and other variants.
For now, settings respect the operating-system dark / light preference where possible, falling back to dark when the preference is "auto" or unset.
Fullscreen toggle
F11 toggles fullscreen at any time. The setting is not saved as the default unless you explicitly change it in settings → start state.
Window controls (Windows / Linux)
Companion uses native operating-system window controls on macOS. On Windows and Linux, custom window controls render at the top-right (close, maximise, minimise). They behave the same way as native controls; the custom render exists to match the application's design language.