How can I edit or delete columns in test runs and results?
Thanks for your posting! Do you mean directly on the Test Runs & Results overview page or an actual test run (with the list of tests etc.)? For the run page, you can configure the columns via the Columns button in the toolbar above the test list.
The Test Runs & Results overview page currently uses a fixed set of columns but you can change the grouping option in the sidebar and this adds additional context details (such as the creator or milestone etc.).