I improved my previous script with inspiration from Danne's latest build.
Now you can choose three buttons (INFO, SET or HALFSHUTTER) to toggle between normal and 3x crop in mv1080.
Or you can disable this functionality.
It's a LUA script which should be set to autorun.
It adds a menu entry in the ML video section.


No need to enter and exit the Canon menu anymore.
I'm pausing and resuming Live View, which I spotted Danne doing in his latest commit.
But I find my way of switching is a more responsive.
This solution switches instantly whereas with the latest build I need to keep the halfshutter pressed for a bit before it toggles.
Plus you get the choice to use other keys.
The script is on GitHub:
https://gist.github.com/Jip-Hop/688253710f25d3a0ff008f908241d1b0.
I found it quite tricky to get the menu working like I wanted.
Tried to mimic how "RAW video" menu item works (SET button to toggle on and off and Play Button for submenu).
But couldn't figure out how to do that (for me it would always enter the submenu and never toggle with SET...)
So the menu isn't perfect, oh well...
By the way Danne, in the cine.lua script you forgot to replace the last occurrence of cinema 2:35.1 with cinema 2.39:1.
Now the code in first if statement would not work I think.