As on the manual page it is clearly demoed how to select a region with the mouse and move those notes to a different area while holding ALT and Drag/Drop it. Now the difference with CTRL is clearly copy, but I don’t understand while you press CTRL you first have to move the region for the icon to change into that + sign thingy (pressing ALT gives you the hand instantaniously (is that a word?)). Also when I release the CTRL key while moving it changes into another different icon and perform a move action but it’s not the hand symbol. Did I skip a page here?
edit: figured out that releasing CTRL turns into move mode