How do I choose which columns show in the ticket list?

Click the "Columns" button in the ticket list header to open the "Columns & filters" window. Each ticket field has a row with a drag handle and two switches: "List" controls whether it shows as a column in the ticket list, and "Filter" controls whether it appears in the right-hand filter panel. Drag rows to reorder, then click "Save", or "Cancel" to discard your changes. "Reset to default" restores the standard set. At least one column must remain visible.