ON Excell I usually click on a Cell and then Shift + Arrow key to select multiple contingous cells. Or when a cell is selected and i click on the arrow key example the right arrow key the cell selection should move to the right selecting the cell on one to the right. but it doesn't it only moves the view to the right.

this happens not only on my Excell application but anyapplication it seems it only moves the view of the application, instead of selection.

how do i revert back to the way i had it.