I\'ve done some searching and found a wealth of information on binding keys in vim, but I can\'t find out, for sure, how to map shift-tab. Or what command I need to map it t
To test if vim actually gets your shift+tab go into insert mode
ctrl+v then tab and it should create a tab character
ctrl+v then shift+tab and it should create an inverse tab character (which appears as ^[[Z)
If it does not, then vim is not receiving the shift+tab input
In my case it was my terminal.
In the terminal window -> settings -> shortcuts
search shift+tab and unmap