To edit a filter:
Open the tab containing the filter that you want to modify.
For example, open Builds > Build Classes.
From the Saved Filters drop-down menu, choose the filter.
Click the (modify filtering) button for the column for which you want to filter or refilter.
For example, click the button at the top of the Duration column in the Build Classes tab. The filtering details dialog box appears, which lets you filter out builds whose durations (in seconds) are outside of a specific range:
Enter or modify the filtering details in the dialog box and then click Apply.
See Filters - Create or Edit a Filter for field definitions.
The table is refiltered, and the filter changes are saved.