# Using Themes

Use themes to customize Bike's colors and fonts (in future). You can quickly switch themes in Bike's "Appearance" settings panel. You can share themes with other users.

**To choose a theme:**

1. Open Bike > Settings > Appearance
2. There choose your preferred theme for light mode and dark mode.

**To install a theme:**

1. Choose Bike > Settings > Appearance
2. Click the "Open Themes Folder..." button
3. Drag or modify any top level `.bktheme` file in that folder
4. New themes should immediately appear in the popup menus in the Appearance settings panel.
5. If it doesn't appear in popup, there may be a syntax error in the theme. Use Window > Logs Explorer to see problem.