please tell me the shortcut key
The basic shortcuts for DaVinci Resolve are better explained in the article posted by Blackmagic Design on Vook.
17 Shortcuts You Must Remember When Using DaVinci Resolve
Learning shortcuts is very important if you want to work quickly and efficiently with DaVinci Resolve. In this article, I'll list the hundreds of DaVinci Resolve shortcuts that will be useful if you remember them, numbered according to the version number that will probably come out next week. By the way, Command + Z (return), Space (playback), ←→ (move frame), and other shortcuts that are available in other software are omitted because they are endless. Check out this article for the latest editing shortcuts in DaVinci Resolve 17...