As first step you could try to open
File -> Options -> Tag Panel
and check if you can adjust/delete your last modified Tag Panel Field.
If that does not help, you could reset the Tag Panel to the default settings:
Try to open your Mp3tag configuration folder:
File -> Open configuration folder
Then doubleclick the \data folder in the automatically openend Windows File Explorer.
Inside the \data folder, delete the file usrfields.ini
One drawback if you delete the file:
All your custom tags and modifications in the Tag Panel are gone.
The Tag Panel will be reset to the default settings.
Thank you for your helpful advice. Unfortunately I haven't saved any configuration files in the past, but I will certainly do so in future! I have on Poweramp, and realise just how important this is!
I have found the file usrfields.ini and can delete it as you suggest.
Apart from the content of 'Genre' I haven't knowingly made too many customisations. When I finish entering each new CD's mp3 files, I do click in Convert, as this allows me to append the composer's name to each separate track automatically with a set spacing. Would that disappear, and, if so, should I take a look at the Convert settings, in order to be able to paste and copy, when usrfields.ini is deleted?
Once usrfields.ini is deleted, where will I find the option to select which tag I want to appear on the Tag Panel - presumably I can see which ones are currently showing, and just make a note of this?
Is there anything else I should do in advance of the deletion, to minimise the disruption?
This won't affect the actual data that fills each column - Composer, Artist, Genre etc, will it?
There is a saying, 'Strength Through Adversity', and this couldn't be truer with software, I think!
Although I'd actually deleted the Tag Panel and contents, I have now learnt a lot more about putting these items together from scratch, myself!
I am now confident in getting everything look, and function as I want it, rather than try to manipulate the default settings. Thank you, and Florian, in particular, for guiding down this path, and showing me what to do next - it's certainly given me a new lease of life, using MP3TAG!
I have just one question, which hopefully I didn't flag up earlier:
On the attached image, I have selected all the columns, but in reality, I wanted to select the content of ONE column only - say, Composer, or Artist, in order to come up with a similar drop-down list as I have already achieved with the Genre column.
I'm wondering whether this can be done by using Filter, or whether there is another leger de main that achieves the same result?