But when I now open the document “Cardfile” in Notenik, the field “Card color” is empty, i.e. without any selection option.
But I need several custom selection fields for my “personal database” in Notenik.
Is there a solution for this or is this a feature in the future?
Well, first of all, @ChadBerlin, welcome to the Notenik community! Glad to have you here!
Second, let me assure you that your goals are entirely aligned with those of Notenik: plain text databases – Yes!
Next, you can probably uncheck the “other fields allowed” option. What that means is that Notenik will allow fields other than those defined in the template file. But as long as you are defining the fields you need in the template file, then this option doesn’t do anything for you.
And finally, to answer your real question, you would want the line in your template file to look like this: