@Darek96 I tried this the other day, I wanted to change the size of font in each text to all the same, thinking i was going mad i couldn't remember how to do it tho - I selected all, no change when changing font size except the one that was orig highlighted, I grouped them, still no change, I copied n pasted attributes, still no joy, I've been using MEP recently as it's stable, faster & plays back good res no prob, in there I select the ones I want alter, change the font etc & all selected get changed,

I think in Vegas you will have to choose the preset or create one, apply it to the timeline then add your writing/text to the box,

Without using a script, you would need to open each title individually, copy the text, select the preset, and then paste the text.

With a script, you can do them all at once without needing to copy/paste anything.

The easiest way might be to use a script to change the parameters you want changed. Presets will always change everything.

Thanks for the answer. Where can I find atrributes/method names for all OFX parameters?

eg I want to change text Outline:

OFXDoubleParameter outlineparam = (OFXDoubleParameter)fxo.FindParameterByName("OutlineWidth");
        outlineparam.Value = 0.5;

but where can I find all of these parameters listed? I can check them manually one by one in the script but it's a tedious work.
Vegas pro API lacks this info.

Hi! I have a lot of subtitles in my video and I would like to edit them all at once (font, alignment, color, outline, shadow... everything EXCEPT text).

With the extension https://vegasaur.com/Vegasaur you can edit existing title events on the timeline all at once without affecting the text: