Is there a way to choose, select all tracks at once during a merge?

Is there a way to choose, select all tracks at once during the merge of albums?
I can choose many albums (no more as 50), but I can’t select all tracks of the albums easy later.
The last Glenn Gould album is a set of 78 discs with 900 tracks. I would like to see 1 album with 78 discs and not 78 albums as it happens now.

Hi Cas,
I’d suggest moving the albums out of Roon first and editing tags in an external tag editor so that each track has an appropriate disk number and each album is 1/78, 2/78 etc.

You can edit in disk numbers in Roon in Fix Track Grouping, but I’ve only ever done it file by file.

Once you’ve got tags set up you can shift it all back into Roon and hopefully find a new 78 disk album.

The tracks and disks numbers are shown correctly “out-of-the-box”,it is 1/78, 5/32 etc., but unfortunately as 78 independent discs which I have to merge. It’s not a problem if I have to merge a few discs, but in this case I have 78 of them.