Transparency Grid icon in Source/Program Monitors
It would be handy if a new icon to toggle 'Transparency Grid` on/off were added to the list of icons that can be displayed in the Source and Program monitors.
I personally have a keyboard shortcut assigned to this (CTRL-T) for much quicker access, but having a visual icon could help other editors access this feature quicker than having to open the wrench menu each time.

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Pierre Louis Beranek commented
That's a good point Matt. With Essential Graphics taking over the Legacy Titler, a button to quickly toggle transparency on/off is even more necessary now.
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Matt Crum commented
I agree- now that Premiere is becoming more feature rich as far as the titling/ gfx tools go, it would be great to have a button option to toggle transparency on and off.