Things I did not know about Photoshop

• You can add flash into your image (select image>adjustments>exposure)
• Layers always seem to be a hard concept for me to understand: you build things on top of each other which creates an image
• I had no idea what flick panning was.  It is photoshop responding to a flick of the mouse pan gesture by continuing to scroll the image in the direction you first scrolled.
• There is more than 1 way to open an image file in photoshop:  can open in bridge, lightroom, or by double clicking on the file to open it.
• I also did not know that you can restrict access to certain files.