How to insert a snippet with UltiSnips?

Question

I am using the setup I found in this answer: UltiSnips and YouCompleteMe

namely:

" if you use Vundle, load plugins:
Bundle 'ervandew/supertab'
Bundle 'Valloric/YouCompleteMe'
Bundle 'SirVer/ultisnips'

" make YCM compatible with UltiSnips (using supertab)
let g:ycm_key_list_select_completion = ['<C-n>', '<Down>']
let g:ycm_key_list_previous_completion = ['<C-p>', '<Up>']
let g:SuperTabDefaultCompletionType = '<C-n>'

" better key bindings for UltiSnipsExpandTrigger
let g:UltiSnipsExpandTrigger = "<tab>"
let g:UltiSnipsJumpForwardTrigger = "<tab>"
let g:UltiSnipsJumpBackwardTrigger = "<s-tab>"

I am working on a tex document, and trying to insert the snippet in the screenshot. Pressing tab, or ctrl-n will cycle me through the options presented, but I can't for the life of me insert the snippet. Pressing enter, space of just continuing with { just behaves as if I were typing (which I guess is what is to be expected, but I had no better idea).

What do I need to do to insert the snippet shown there?

Answer 1

Code:

let g:UltiSnipsExpandTrigger = '<c-g>'
    "strange that I have to change this
    let g:SuperTabMappingForward = '<s-tab>'
    let g:SuperTabMappingBackward = '<tab>'

go to the snip option in the menu, and press ctrl-g.

Originally, it supposed to be tab, what expands. But supertab has taken control over tab.