Some advice for a newbie please!

Is it possible to control various parameters in panels in apps that don’t offer much support for the Touch Bar?
For example in Affinity Designer, is it possible to control font size or transparency etc if the app doesn’t offer this control natively for the Touch Bar?

I hope this makes sense!

Yep, you can make various triggers to increase the font size, for sure. I'm not positive about transparency, but if it's on a menu, you can assign it to a trigger quite easily.

Thx. Most of the menu items open or activate a panel - the character panel includes controls for font size, font style (italic, underline etc), character spacing, word spacing etc. These are not accessible from a menu - only by clicking the mouse and increasing or decreasing the value.
Would these parameters be accessible by BTT?