In the latest daily builld of Rstudio RStudio-1.2.1125, I'm amazed that we have a bunch of new bindings. For example, Ctrl-Alt-K and Ctrl-Alt-Shift-M both give multiple cursor selectinos over the word at point.
Where can I find other such additions, documentation for these features, or the source for these new features on the Github?
Regarding to shortcuts, you can access most of them through Tools / Keyboard Shortcuts Help menu. You can also assign your customized shortcuts to many (many) more functions at Tools / Modify Keyboard Shortcuts... menu.