how to lock first row when scrolling page down

I have 3 buttons in the top of the page horizontaly abd below that I have a long image

I want to be able to lock the top of the page (3 buttons) then when I scroll the long image down I will always see the 3 buttons

unfortunately this is not possible

star issue 2150 https://code.google.com/p/app-inventor-for-android/issues/detail?id=2150

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