"What Can I Customize?"
The following settings are customizable for the normal tree:
- Indentation
 - Indentation characters (the tree's branches)
 - Padding
 - Directory color
 - Label colors (for labeled modes)
 - Git markers and its colors
 - Regex match color
 
The following settings are customizable for Rootless mode:
- Widget border color
 - Standard item highlight color (the color for items that do not contain a Git status)
 - Git status colors (for items)
 - Regex match color