You've turned on the Grid. To turn it off you can try either Cmd/Ctrl+' (that's the single quote character), or go to View> Show> Grid and click it.
1 person found this helpful
Try View > Show > Grid
Hey thank you!! I knew it was something simple, but I culd not find the command. Thank you So much!
Thank you Steve, my fingers slipped and I had no idea what happened!