How to change ui fast user interface of MIT App Inventor open source

can anyone tell me how to change the UI user interface of MIT App Inventor?

not finding a css file

You should check the file.
It will lead you to various UI related files such , , etc.

It is not easy because ui is made with many files you can look at appengine folder for ui of app inventor

You should check

client/explore/youngandroid/ file


Hello @Android_Builder and Welcome to App Inventor :slightly_smiling_face:

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You can use ya.css file for change user interface

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