Thanks, but this brings to the top of the document.
I want to move the selection to the top of current view area.
Example:
Open document with 10 pages, pagedown till page 5, at this point I see page 5 in the screen, but the cursor is still in the page 1.
I want to move the cursor to the top most paragraph/position of the visible range of text.

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Backup your original file before doing any modification.