From the post
Open the piece and tap Publish (on a phone, the paper-plane icon at the top right).
Under Posts, next to a post marked Posted, tap Add results (or Update results).
Tap Read from screenshot and choose a screenshot of the post or its insights. Studio fills in the numbers.
Check them, add any that are missing, and tap Save results.
Numbers like 1200, 1.2k or 2m all work. Leave out any number the network does not show, and update them any time.
From the editor
Open the Results tab in the editor's side panel to log numbers for the piece as a whole, with the post link and notes on what worked. On a phone, tap the panel icon at the top of the editor to open the side panel. The tab takes numbers once the piece is published.
Good to know
Reading a screenshot uses one writing request.
Use a clear screenshot of the numbers. If none are found, type them in.
Once your published pieces have results, Learn from my best posts in Create writes new drafts in their style.