Here are some useful shortcuts within Propresenter. I bolded the ones that I use a lot. Feel free to add others by commenting.
ProPresenter Menu
• Open Preferences: Command , – to change resolution, margins, shadow sizes, check and uncheck display at top most layer, access modules…
• Quit ProPresenter: Command Q
File Menu
• New Presentation: Command N
• Import Presentation: Command R
• Import Background: Command Shift R
• Export Selected Presentation: Command Shift E
• Save Data: Command S
Edit Menu
• Undo: Command Z
• Redo: Command Shift Z
• Edit Slide / Done Editing: Command E
• Duplicate Slide: Command Shift D
• Cut: Command X
• Copy: Command C
• Paste: Command V
• Select All: Command A
• Deselect: Command D
• Create New Slide with Remaining Text: Option Enter – fast way to split slides, e.g. to split a slide with four lines of lyrics for the main to two lines of lyrics for overflow
• Send Remaining Text to Next Slide: Option Shift Enter
Text Format Menu (Only Active in Edit Mode)
• Show Fonts: Command T
• Bold (Font Dependent): Command B
• Italic (Font Dependent): Command I
• Underline: Command U
Action Menu
• Clear All: F1
• Clear Text: F2
• Clear Background: F3
• Clear Audio: F4
Window Menu
• Show / Hide Output Window: Command 1 – if you are not connected to a secondary display, you can use this to view your output in full screen