When some one clicks a btn from another screen an action happens in another screen

When someone clicks on a button from another screen, an action happens on another screen is this possible in Ai2 (app inventor)?

It won't happen until you open the other screen. You will need to pass values to the other screen in order to effect the change when you open it.

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i was telling that only

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What should we write for example in "something" block and "do_something " block ?

It can be a string/number or list

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