trevors wrote on Apr 26^th, 2020 at 6:43am:

737 manual #2 page 67 - flight director

It's better to be more specific.

‘737 Captain’ MANUAL Part II –Aircraft Systems (csx737_manual2.pdf), page 67:

Navigation unit - pitch and roll signals for capturing and tracking VOR radials, localizer courses, and glide slope beams.

The FD does not do what is described above.