Hi Maarten 

Thanks for posting in the Lucid Community! Yes you can create actions to toggle your document’s conditional formatting rules. To use your shape to toggle conditional formatting rules on and off please follow these steps:

1. Select the shape you'd like to add an action to. 
2. Click on the lightning bolt icon in the formatting bar at the top of your canvas. 
3. Select Conditional Formatting from the top of the Actions menu.
4. From the dropdown check the boxes next to the rule(s) you want set up to toggle.
5. Click Done.

Once the action is set up the shape at hand will function as a button with which you can toggle the rules on and off by using the hotkey Command + Shift + Click for Mac and Ctrl + Shift + Click for PC. 

For more information about how to embody interactivity into your documents please read through our Add Actions to your diagram article from the Lucid Help Center. And if you'd like to learn more about how to add conditional formatting rules to your diagrams please refer to our Conditional Formatting article. 

Hope this helps! Feel free to post any additional questions below.