PhotoShop CC 2018 - Video editing - Timeline shows neither timecode nor frames

Edit: I can now provide images. Also, Aaron’s obviously on a Mac, whereas I’m on Windows.

Good day,

The title gives most of the relevant information. Maybe these data are, as well:

• Photoshop is build 19.1.6, if that makes a difference
• I’m running on Windows 10, on a desktop computer

So, I get these notches/fenceposts that show at regular intervals on the Timeline, but neither frame counts nor timecode shows on them.

I’m a technical writer who’s fairly new to PS, although an enthusiastic learner. HOWEVER…I have an absolute wizard in-house with me—15 years of experience. He doesn’t have a lot of experience with editing video in PS, but he can’t figure it out, either.

Between the two of us, we’ve looked at every setting that we think could be relevant, and nada.

I have already Googled. Any and all suggestions are welcome, though.

Thank you,

CoolWahad