In looking at the tab menu, I noticed that Proctor, Morris. Logos 6: Training Manual. Vol. 1. Murfreesboro, TN: MP Seminars, 2015. has the following shortcuts:

which does not correspond to the menu itself:

Notice the menu doesn't even show a shortcut for the close all tabs options.
The Help document: Logos 6 Help. Bellingham, WA: Faithlife, 2015. shows both options:

BUG: shouldn't the menu at least show the close all panels options? And if there is a preferred command (vs. historical) shouldn't it be marked as such?