Not in the current version, but I just made Alt+P to be the shortcut for ScripturePad in the coming v5.1.
The best way to see the shortcuts is looking at the items in the menus. They are also listed in the User Manual under the Main Menu entry.
Developer, Bible Analyzer
But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness. (Rom 4:5 AV)