Themes allow you to reformat various parts of your calendar. Usually you’ll use this to change colors, change fonts, or add borders.
The backend of this system uses CSS, but we’ve tried to add a friendly way to manage the formatting, without requiring you to know CSS. By clicking “edit” you’re able to change aspects of the calendar, and automatically create CSS. If you are fan of CSS, you can manually type in CSS into the “Extra CSS” field for each element.
In addition, “Custom CSS” allows you to add additional CSS options that may not be available from the selections above.