Can I use the mouse to copy and paste on the iCloud version of numbers?

I've done some searching, and the only thing I can find is Apple's announcement of a new feature - tips on how to use the keyboard to cut, copy and paste appear when you try to do it with the mouse and context menu. While I'm sure this is a lovely feature for the people who *want* to use the keyboard, I'm left handed, and it's awkward, it's much easier for me to use the context menus with the mouse. Can this be re-enabled?