Hi @teejay ,
You can learn more about Toggle Switches here: https://support.wix.com/en/article/adding-and-setting-up-a-switch-element
An example of using the Toggle Switch is to make a website with ‘Dark Mode’ and then using the switch to switch between Light and Dark Modes as shown here: https://www.wix.com/velo-examples/darkmode
https://www.wix.com/velo/forum/tips-tutorials-examples/example-dark-mode-switch