How to use components for backgrounds

Is there a chance to add a background to all glyphs for a specific width (100%) and height (any pt)? I am trying to have a negative version of a font and that would be very helpful. Thanks for your support!

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There is a plug-in that does that. Take a look in Window > Plugin Manager and look for Inverter.

I did that for my contribution to the Beirut typeface. It was a very complicated background, though.

Thanks for all your support on this and so many other topics! I appreciate it!