# Lesion Tracker - User Preferences
To view User Preferences dialog, select **Preferences** on the Configuration menu. User Preferences dialog includes a couple of tabs:

![Configuration Menu](../assets/img/LesionTracker/LT_Configuration_Menu.png)

#### Keyboard Shortcuts
There are a number of default shortcuts for the defined tools. To change the shortcut for the tool, type the desired key into the tool field.

![Keyboard Shortcuts](../assets/img/LesionTracker/LT_Keyboard_Shortcuts.png)

#### Window Width & Level Presets
There are a number of default Window Width/Level settings in the Window W/L tab. To create a new setting, enter the desired column field.

![Window W/L](../assets/img/LesionTracker/LT_WL_Presets.png)

## Color Themes

1. To modify the colors in the viewer, select **Themes** from Configuration menu.
2. Select a theme then click **Apply theme** to change the theme.

![Themes](../assets/img/LesionTracker/LT_Themes.png)