No format brush is really disappointing

[dongyangli-del]

I am a develper and student, and I sincely you can push the format brush function.

[mararad]

Hi,

You didn't fill issue template so issue details are missing. My initial suggestion would be to use "Set as default style"
Details can be found here: https://www.diagrams.net/doc/faq/shape-styles

Dos this help?