how to I add swimlanes in addition to the default 3?
I am guessing you meant the agile boards? If so, a board admin can configure the board and add swimlanes under the relevant tab.
Do you mean you want other types of swimlane? You can't add to those without hacking the code in Agile. But you can base a swimlane on a filter, so you can actually do almost anything with them.
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