Editing labels on a board
Naming labels can make it much easier to remember and share what the label represents. Label names can be edited by hovering your mouse over a card, clicking the pencil icon that appears, then "Edit labels." Click on the pencil icon of the label you'd like to rename
Board admins can also edit label names from within a board's menu by selecting "Labels," and then clicking the pencil icon next to the label they want to rename.
You can delete a label in the same place that you rename the label. To do so, simply click on Delete at the bottom of the change Label menu.