Feature Request: The ability to control paragraph text height & width via expressions

Big yes to this - anything that makes responsive design more accessible is super-welcome.

Being able to replace a whole set of custom expressions with one native one means less to go wrong and that extra bit less processing overhead needed, which is always good!

This has been possible for ages. It’s not easy but it’s not rocket science either. As you already know, it does require expressions. I do have a rather advanced and longish course that covers this and even more advanced Responsive MoGraph stuff. I am also thinking of developing a shorter course that delves into advanced MoGRTs such as the one you’re alluding to but it’s going to take time. 

With LLMs etc, it should be much easier now to crack the ‘secret’ code - so, it’ll be much better pursuing it on your own if you’re in a rush - I know OP posted 3 years back but since someone posted just yesterday … 

I just want to make it clear the initial request is doable in After Effects and for quite a long while. 
 

Same here. I’m creating mogrts that appeared simple: shove some custom text into a dynamically sized rectangle that slides in/out of frame, and I’m forced to use complicated expression workarounds  to measure the width of text (via sourceRectAtTime() or counting characters) and insert a line break character at an optimal location… Or just have the editor insert manual line breaks. Which is… fine, but sometimes gets screwy when copying and pasting from janky emails and Word docs. But also, most editors are not typographers and don’t understand widows or orphans.

For fun, I tried making the text box bounds the width of the comp and using .setLeft/RightMargin(), but eventually hit the secret maximum margins of 1296 (It seems all paragraph options cap out at 1296—even in other Adobe apps like Illustrator). Which is not enough in the days of 4K.

Looking forward to having this in ae soon!