How to scale a text box (frame) by value (I mean by reducing the % or value of width/height amount, not by dragging the node) and keep the text proportion (scale text inside by the same value)?
The closest thing I can think of is to resize the Paragraph Text frame, then use Text>Paragraph Text Frame > Fit Text to Frame.
It is a kind of solution with many "buts" :)
I'm surprised that the functionality of scaling text with frame is implemented but works only with Alt+ combination and not with values.