I noticed that is not possible to use rectangular selection for designator in Altium (PCB view). I have to select them by clicking on each of them. And for moving a group of them I can't use keyboard shortcut.
I understand that designator is not a object by itself but is attached to a component (unlike the text objet)
but there is a way to rectangular select on a group of designator and change value of them ?
EDIT : Partially found a way. Go to top layer, select the component via rectangular selection (with component filter activated), then, click on the blue text "Designator" for all selected component. It select the corresponding component's designators.