I have been having trouble when it's come to keyboard shortcuts for viewing artwork. Eg. Last time I used Illustrator when I hit the space bar it would switch to the hand tool (when not in text-edit mode), now nothing happens. When I used to hit space + command it would switch to zoom in tool, now it switches to direct selection. How do I change this back? I've been to Edit>Keyboard Shortcuts but I can't seem to change it in there.