Drop-down menu to change part side

I made a drop-down menu.
If I press the menu, I want to set only the yellow part to be changed, but it doesn’t work.
How can i make it work?

Hey there, sorry to hear you’re having trouble!

It’s hard to guide you with this screenshot alone, without seeing how you’ve set up your prototype. Please reach out to the support team directly via this form for help: https://help.figma.com/hc/en-us/requests/new

Be sure to use your Figma account email, include a link to the file, and share it with support-share@figma.com, so we can take a closer look.