Shown below are the contextual menus available in Photo Print. The main menu bar items with the same name have the same functionality.
Main Contextual Menu

Current undo - Undo the last operation.
Cut, Copy, Paste, and Delete - Edit menu functionality
Frame Size - A submenu that allows you to change the frame size
Rotate - A submenu that allows you rotate an image within a frame.
Arrange - A submenu that allows you to change the z-ordering of frames on the page.
Reset Image - Restore the image to its original settings.
Delete Page - Delete the page you have clicked on.
Frame Size Menu

Custom Frame Sizes - The first set of frames are the ones you create in the preferences window.
Built-in Frame Sizes - These are the built-in frames sizes that come with Photo Print.
Full Size - Use the original size of the photo as the frame size.
Invert Size - Switch the dimensions of the frame. The width becomes the height and the height becomes the width.
Rotate Menu

Rotate Right - Rotate the image clockwise.
Rotate Left - Rotate the image counter clockwise.
Rotate 180 - Rotate the image 180 degrees.
Arrange Menu

Send Forward - Bring the frame forward one slot.
Send To Front - Bring the frame to the very top.
Send Backward - Send the frame backwards one slot.
Send To Back - Send the frame to the very back.