It’s super easy to make diagonal or custom guides in Illustrator! Just grab the line tool or pen tool, draw the line and then go to view guides make guides. If you are into keyboard shortcuts its apple+5 on mac or control+5 on PC. Walla!

Have a suggestion for a quick tip? Wondering how to do something in Photoshop, illustrator, indesign, dreamweaver, any program? Ask away!