Question

What is the use of F7 key, shift +F7, Alt +F4,Ctrl + Enter, ctrl+> , ctrl + shift ++ ,

Answer 1

F7 - used to check spell and grammar
shift+F7 - runs a thesaurus check on the word highlighted
Alt+F4 - closes the current window
Ctrl+ Enter - to stay on the active cell.
ctrl + shift+ + Insert blank cells or rows and columns