I'm trying to create a digital asset to get familiar with the workflow. Somewhere in the process all my parameters in the parameter interface got locked. I didn't lock anything anywhere on purpose and I cannot find out where I can unlock them. The content of the subnet is not locked, only the parameter editing. I can move parameters between folders but not delete or edit them.
This happened a few times now, and I really need to get to know what I'm doing wrong instead of having to start over every time.
Can someone please help me?

OK, got it. Once it is a HDA the parameter interface has to be edited via the Type Properties Editor. Not obvious at first but logical