On the Panels tab in the Preferences screen, you can change the appearance of EditPad's side panels.
You can select a font face from the drop down list. Set the font size using the spinner box. Click the Background Color button to change the background of the side panels. Click the Text Color button to change the font's color.
These settings are used by the Clip Collection, Files Panel, Explorer Panel, FTP Panel, File History, and File Navigator panels.
These settings are not used by the Character Map and the Search Panel. Those panels use the same font and color as the file you're editing. The font and colors for files can be set via Options|Configure File Types.