Thank you so much!
I had been learning FX scripting (not a bad pursuit!) to attempt this task. I was unable to find a way to modify all 400 + texts to change the font size & position with scripting
XML made it very easy.
I exported as a XML file.
I did a global search and replace in that XML file for the first parameter, and replaced it with the second.
find <value>28</value
replace with <value>43</value>
find <vert>0.375</vert>
replace with <vert>0</vert>
I found the position was in a different number format than I had expected. I made the desired changes to the first text, than searched in the XML for the parameters associated with that text.
I saved the XML file, and re-opened it as a new project.
I still had lots of cleaning up to do, but it will take MUCH less time than opening 400+ text slugs and changing them.
I am captioning IMAX films for the Fleet Science Center in San Diego.
They play back as a quicktime file with a protools session.