You can filter proofreading issues in the Proofreading panel by category and flow; for example, if you want to focus only on issues relating to time signatures in the second flow.
Procedure
Result
The Proofreading panel updates to show only issues in the activated categories and flows.
Tip
You can change the default categories that you want to show in the Proofreading panel in all future projects on the Proofreading page in Preferences.