How to highlight a group of files without clicking each one

[DetlevD]

@danielvogel

... I want to highlight say the 15 tracks ... there is no space to the right or left of the track names in which to put the cursor to do this. ...

Set the mp3tag listview left adjusted to see the icon symbols.
Place the mouse cursor into the left margin between the icon and the left window frame.
Now you can do what you want.
Hold down the primary mouse button and drag up or down along the tracklist.
Doing so the mouse cursor get additionally an elastic selection frame.

See also ...
How to quickly select files

DD.20131219.0905.CET