Tamaño de letra spart 2.9.4

Hey, we’ve noticed that in spark version 2.9.4 is not possible to modify the the font size by using the editing chart for the instant messaging. In version 2.7.7 was possible to do it in that way. I added screenshots that show the way it used to look like in version 2.7.7 and the functionality. is there a way to modify the font size and everything related to that in the current version o this functionality has been completely removed?
thanks a lot

So it is displayed in 2.7.7

Yes, I see it worked in Spark 2.7.7.
I suggested to fix this, and now the text in the chat, in the letter area and in the message history will be the same size