I am currently trying to find an expression that will allow me to change the font style and font size using square brackets. We have a platform that works as a bridge between a user and After Effects, so any text input is being completed through the API so the manual adjustment of specific characters or words is not available.
I have the above expression for changing a colour but cannot seem to find one to change both the font style and font size. Please see the colour expression below. This makes sense because I can then choose RGB FILL as an additional property to instruct AE to change the properties of text within square brackets.