Suggestions about the new flags
I have a few suggestions regarding the newly-added track flags (#3011 (closed)).
Relocate the flags in their own section, rather than have them in "General options"
When the position for the track properties is "in a tab widget below the files and tracks", the "General options" tab becomes too tall and there's barely any space left for the "files and tracks" themselves, especially on screens with smaller resolutions or when the font size is increased. If the flags have their own tab, that would solve this issue.
Checkboxes rather than dropdown menus with Yes/No options
The flags in Chapter editor are turned on and off with checkboxes. For consistency and for convenience, the flags in the Multiplexer can be turned on and off the same way. This would also solve the issue with the "Determine automatically" option for the "Default track" flag (when this flag is set to "Yes" for one audio track, and then set to "Yes" for another audio track, the value of the flag for the first track becomes "Determine automatically", which is basically a "No").
Column in "Tracks, chapters and tags"
"Default track" flag and "Forced display" flag have their own column in "Tracks, chapters and tags". Maybe the newly-added five flags can have a column as well, which can be turned off by default.