Here are the following steps to customize your theme:
Click on "Settings".
3. Click on "Present mode".
You can select the pre-existing customized themes from the "Gallery".
Click on "Custom" to add a customized theme.
Click on "Add"
Fill in the details for your customized theme.
Click on "Preview" to view the theme.
Now click on "Save" to save your customized theme.
Now you can select your customized theme to apply to your event.
Click on the "Clock button" to edit your customized theme.