You can apply most of the changes to multiple issues in one action. Select multiple issues and use toolbar, keyboard shortcut or drag and drop.

Some actions may have limitations of applicability when multiple issues are selected. For example, if you select both a parent issue and a sub-issue, the "Unindent" action will not be possible.

The following actions work with the multi-selection:

See Selecting Multiple Issues for details about working with multi-selection.