DIM FEATURE REQUEST:

Text only "dims" can often loose contrast making "such important"
dimension information (usually for manufacturers) hard to see.

Allow "rect" call out features to have a background colour
assigned and consider other shapes, allow a "circular" or maybe "circular and square" etc.
Some examples of call out styles:
https://product.corel.com/help/Designer/Documentation-Windows/index.html?app=Corel-DESIGNER&lang=en#/l3TOC100

Scope:
Very useful if annotating dims and or leader
right on top of colored 2D and 3D objects.

Clunky Workaround, can use a reversed font, like this:
https://fonts.google.com/specimen/Monofett?preview.text=123%20high%20contrast%20leaders

https://font.download/font/block-helvetica

https://www.whatfontis.com/GOOGLE_Monofett-regular.similar