For those on the Office Insider program on Mac, Microsoft has released a new update on the Slow Ring.
With the latest version 16.40 (Build 20073000), Office Insiders on Mac can now record inking while recording a presentation and play it back after.
This has been one of the most requested features and Microsoft is happy enough to make it available to their users.
With ink recording, you can indicate specific areas of your slide and add additional annotations that can be played back.
To record, go to the Slide Show tab, select Record Slide Show > Pen in Slide Show Toolbar > Ink then exit the Record Slide Show area.
Source: MS Office Insiders