iVMS-4200 How to get motion / human / vehicle (colours) on playback timeline? (the old favorite question)

[codlord]

Is there any definitive post or guide to this? I have seen various posts but still not been able to do what I want. I thought in the past that my NVR's / cameras were too old to support this sort of thing. But now I have an old NVR which shows Human/Vehicle options on the timeline (as does iVMS-4200), and my camera shows Human/Vehicle options and shows the "H_xxx" and "V_xxx" markers on the video. But seemingly I still can't see any colours on the timeline or search for Human/Vehicle.

I record constantly so this is not about recording certain events, I just want some colours on the playback timeline to aid reviewing/finding footage. I don't really mind if those colours are just "motion" or something more specific like Human/Vehicle - anything would be a start!

I have lots of NVRs/Cameras but for this example:
NVR DS-7732NI-I4 / 16P V4.61.025 build 220905
Camera DS-2CD2386G2-IU (G5) V5.7.18 240826

Camera config:
Motion Detection ENABLED
Enable Dynamic Analysis for Motion ENABLED
Human/Vehicle CHECKED
Notify Surveillance Center ENABLED

I've experimented with Intrusion Detection and Line Crossing Detection and I can see these things activate in Live View but still nothing shows on playback timeline (NVR native interface or iVMS-4200)...