From RPCS3 Wiki
Below is a list of the available keyboard shortcuts that can be used in the emulator.
List of Keyboard Shortcuts
|Ctrl+L||Toggles mouse lock.|
|Alt+Enter||Enters full-screen mode.|
|Esc||Exits full-screen mode.|
|Ctrl+P||Pauses the game.|
|Ctrl+R||Resumes the game.|
|Alt+C||Pauses the game and captures the current frame.|
Note: Saved in the “captures” directory in the RPCS3 folder in RRC format, RSX captures are useful for debugging or bug reports.
|F12||Takes a screenshot.|
Note: Saved in the ‘screenshots’ directory in the RPCS3 folder.