Dear @interviewaurvey,
good to hear and thanks for the invitation.
And meanwhile, I even found out:
A question type can be hidden by not setting a label or hint. So, the calculated select_multiple in the attachments can be changed to hidden by removing the label. See examples with triggers here XLSForm Docs.
I updated this info in two previous postings too, and added a note in the Rank02_… file…
Similar, a begin_group without label will hide the title, i.e. group header (but not the included questions)… So, you might also remove the label/title there.
Side-note: Better use the 2-letter code for the language English (en)
. See Help Center Adding Another Language to your XLSForm — KoboToolbox documentation international standard here Language Name and Code - #3 by wroos