I was just about to create a topic suggesting this very thing:
As much as I like the inclusion of a dark mode in v3.09, could you please provide an option to toggle the dark mode in an upcoming version (I don't see a way to do so)? I'd like to use the light mode.
I use dark mode as my system setting, but I find Mp3tag's original light theme to be more visually clear. The main advantage of the original theme for me is that the tag panel's text fields have a white background and the tag panel itself is grey, giving better better separation between the black text used for a field's name, and the black text used for a field's contents.
The new dark theme on the other hand uses white text on a black background for both the field name and its contents, which isn't as clear, especially with field names which are long (it ends up looking like a wall of text between the field names and contents).
Another criticism would be that it's not as easy to tell that files are selected once you click into the tag panel. Maybe something could also be done about this? Currently, files are highlighted in blue before changing focus to the tag panel, but after doing so, the highlight turns to a dark grey (almost the same as the file list's background).
This is especially annoying when it is all files that are selected and the file list is longer than the available view. Technically, one could look for the presence of any grid lines (none = files are selected), but if the selected files could dim to be a darker share of blue (when tag panel has focus), or maybe to not as dark of a dark grey as is current, it would be helpful. I don't recall it being as ambiguous in the light theme.
For example, it's hard to tell which files are selected (files 3-7 are selected):
Thanks for your efforts, @Florian!