1# Perfetto UI 2 3[Perfetto UI](https://ui.perfetto.dev) enables you to view and analyze traces in 4the browser. It supports several different tracing formats, including the 5perfetto proto trace format and the legacy json trace format. 6 7## UI Tips and Tricks 8 9### Pivot Tables 10 11To use pivot tables in the Perfetto UI, you will need to enable the 12"Pivot tables" feature flag in the "Flags" tab under "Support" in the Sidebar. 13You can pop up a pivot table over the entire trace when clicking "p" on your 14keyboard. The "Edit" button opens a pop up window to add/remove and reorder 15columns and change the default sorting of aggregations. 16 17 18 19Clicking on "Query" generates a table with the selected columns. 20Table cells with the expand icon can be expanded to show the next column values. 21The "name (stack)" column displays top level slices that can be expanded to show 22their descendants down to the last child. 23 24 25 26Area selection pops up a pre-filled pivot table restricted over the selected 27timestamps and track ids. 28 29 30 31### Disabling metrics 32 33Some metrics execute at trace load time to annotate the trace with 34additional tracks and events. You can stop these metrics from 35running by disabling them in the 'Flags' page: 36 37 38 39 40
