The theme setting lets you select a fixed theme for your presentation.
theme : template
Slideshow settings are activated using a PITCHME.yaml properties file.
The default GitPitch theme is the template theme.
The old themes originally inherited from the Reveal.js project have been deprecated. A full deprecation notice can be found here. While deprecated, these themes remain to provide backward compatibility for presentations created before June, 2019.
If you do not explicitly set a value for the theme setting your slideshow will automatically be rendered using the default theme - the template theme.
See custom theme setting for details on how you can override any style associated with your chosen theme.