One work around might be to use the now timeline. Line it up where you want it to be against the quarter note and bar lines across the top of the tracks window.

Also, you can dedicate a track to use hand claps or click two sticks together to create visual timing marks.

If implemented I'd prefer to define the distance between gridlines by note value such as 1/4 note, 1/8 note, 1/16 note, 1/32 note or 1/64 note values.
Jim Fogle - 2020 BiaB (730) RB (Build 5) Ultra+ PAK
Cakewalk - Zoom MRS-8 recorder
Desktop: i7 Win 10 build 2004, 12GB ram 256GB SSD, 4 TB HDD
Laptop: i3 64bit Win 10 build 2004, 8GB ram 500GB HDD
Music at: http://fogle622.wix.com/fogle622-audio-home