Configuration & Simulator (Beta)

Try changes in the browser before using them on your desktop. Adjust shortcuts, pointer speed, and mode styles, or practise layouts and tab groups with sample windows.

Choose Configuration & Simulator... from the app's status menu to import the active configuration and existing workspace automatically. You can also open it below and import files yourself.

Open Configuration & Simulator ↗

Preview locally, then apply your files

Data stays in your browser and is not uploaded. Website actions change the preview. The desktop app uses your changes after you download the configuration or workspace file and place it in its data directory.

Recommended workflow

1. Import your TOML file or start from defaults.
2. Change keys and styles while watching the preview.
3. Download keysteer.<name>.toml into KeySteer's data directory.
4. Choose Reload Configuration from the status menu.

If configuration validation fails

Run keysteer --check -c <file> for the reason. The simulator previews behavior; the desktop app remains authoritative for complex actions, external commands, and platform permissions.

Edit layouts and tab templates

Opening from the app menu also imports presets from an existing workspace.ksw. Or choose Import workspace file. Select a layout number to edit regions; Ctrl+S edits its note. Save and download workspace saves current edits and preserves other presets.

Place the downloaded workspace.ksw in the data directory, then use Alt+W → R to read it again. No restart or TOML reload is needed.

See Configuration and Modes and actions for the full syntax. The simulator opens in a separate page and also works well on a second display.

Visual window card editing

Select Window, Quick, Editor, Restore, or Tabs, then adjust the card editor:

What to change	How
Background, number, app name, title, border	Choose colors and opacity
Fonts, sizes, weight, corners, spacing	Edit values alongside the live preview
Card positions	Click or drag an anchor, draw a range, adjust inset sliders, or select a preset

Changes update the preview and exported TOML. Each setting can be reset individually. During actual use, cards still avoid other markers.