Hi there,
On the Analysis tab, you can select a time interval by dragging the pointer horizontally across a section of the graph. The timeline at the bottom of the tab applies to all graphs on the tab. You can get more info from the below link.
Windows Performance Analyzer step-by-step guide
https://learn.microsoft.com/en-us/windows-hardware/test/wpt/wpa-step-by-step-guide
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