File List, Tag Panel & Extended tags doubts & suggestions from a new user

Thank you for the comments ohrenkino

I cheecked the documentation while I was writting & I already could fix some of my initial doubts.

Yes, I already have done this before but I am not sure it is well done: (if I am not wrong) Key is not authomatically active on the tag list & tag panel, & it is only active in the extended tags when a track has data on its field. So, if you have tracks without key data, how is suppose you will know that Key field is called INITIALKEY? I have cheecked the documentation but key is not mentioned Format Strings and Available Placeholders
I have used %INITIALKEY% as value but not sure this is correct.
Not sure if I am missing something….

Not sure if I am understanding you…
In your opinion would be more useful to see empty fields on the Extended Tags dialogue rather than be aware all the active fields but are not showing as field is empty?
or what do you mean?

Thank you!