Unless bolded, the + is not part of the combination, it's only to denote a combination of keys.

⌘ is used to denote the Command key on macOS, and the Control key on Windows and Linux.Song PageMetadata EditorShift + A: Open the "Title & Artists" section.
Shift + M: Open the "Media & Audio" section.
Shift + T: Open the "Tags, Albums & Metadata" section.
Shift + R: Open the "Song Relationships" section.
Shift + P: Open the "Admin" section.
Shift + Enter: Save edits.Lyrics EditorShift + Enter: Save changes.
⌘ + L: Save changes and close the editor.Album Page⌘ + Enter: Save focused annotation.Artist Page⌘ + Enter: Save focused annotation.