I am learning kivy and kivy md 2. I have a question, how to make a page change handler on MDActionBottomAppBarButton?

I am learning kivy and kivy md 2. I have a question, how to make a page change handler on MDActionBottomAppBarButton?

I am learning kivy and kivy md 2. I have a question, how to make a page change handler on MDActionBottomAppBarButton?

I am working on this project and 6/9 of the things that I need to import are greyed out, and all but one of them are referenced in either the py or kv file. I cannot get this to open. I just downloaded Kivy for the first time two days ago from their site, it downloaded a depreciated version instead of the current one and I cannot figure out how to update it, very frustrated that it would download an old version. Not sure if that is causing the greyed out items. But, I need them to work so the application will work.

comment utiliser des widgets scrollview dans un autres widget srollview avec kivyMD