ZoomGroup is a sublime plugin.
It allows you to use the same shortcut shift + shift to toggle the width of the active group between 0.5 and 0.75
This is only enabled for a two column layout.
cmd+shift+p- type in :
pcar( Package Control: Add Repository ) - paste in :
https://github.com/ninth-dev/ZoomGroup cmd+shift+p- type in:
pcip( Package Control: Install Package ) - type in:
ZoomGroup