While not a direct answer to your question, I did want to point out that you can convert an imported Photoshop text layer into native/editable After Effects text. You may consider simply designing one title in Photoshop, importing it into After Effects, and then creating your versions and variations in there. After importing your PSD (as layers, whether layer or document size), you can either right-click the layer or go to the Layer menu, and choose Create > Convert to Editable Text. The short answer is that if you make alterations to your PSD after importing to After Effects, AE will not see any new layers that didn't exist when it was originally imported. Any layers deleted or renamed will become missing footage in AE. I also wish the connection was smarter/more modern. The ideal is to work out your design before importing, but that's obviously not always the way things work. One (imperfect) workaround: crreat a handful of empty dummy layers in PS before importing to AE. You won't be able to rename them, (and they won't be placed properly if you import at layer size and then alter those layer contents), but ... they'll at least be there. Here's a video detailing a lot of this workflow, and several of the common "gotchas" you're prone to encounter. https://www.youtube.com/watch?v=fuDs-WPyAR4
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