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That's great :D
There aren't many I'm thinking of, mainly ctrl+shift+s for save as
A few combos to edit the arrangement, like alt+click to place a section rather than dragging it. Not many off the top of my head though.

(+1)

“Save as” is bound to Ctrl+Alt+S right now. You can find all of the shortcuts in the Help section (make sure to check all tabs in there!) :)