Is there a way to "automate" the selection and hiding of some collumns on the the (mass visualization) "view"? (and in general, to "automate user actions" on Capella ?)

[FDorner]

Sorry, I forgot to answer.
IIRC, you have to enable the Development/Debug capability in the preferences:

Then you can click the small triangle next to the green run button, and select “Run Configurations…”

There should then be a Groovy for Capella category, where you select the script file, set arguments etc and finally run the script.