In Illustrator you can use the space bar to change the selection tool temporarily to the hand tool or combine with Command to get the zoom tool. For some reason, it stops working sometimes and then out of the blue starts working again. I am assuming it's some strange key command that I am hitting that changes it but can't figure it out. Any thoughts?
You are using a Macintosh. Command-Space is the OS default shortcut to open the Spotlight Search field at the top right of the screen. Change this in System Preferences.