
A trace document can record data over multiple runs of your app. When doing so, it doesn’t discard previously recorded data. The Activity area in the Toolbar shows the total number of runs, the current run, and the time for the current run. Changing the current run updates the data for each instrument in the trace document to the current run. The data is shown only for instruments that were a part of the trace document during the chosen run.

Choose Instrument > Next Run, click the Previous Run button in the Activity area of the Toolbar, or press Command Open-Brace ({)
Choose Instrument > Previous Run, click the Next Run button in the Activity area of the Toolbar, or press Command Close-Brace (})