Wikiquote:Rollback

Rollback is a MediaWiki user right that allows administrators (sysops) and patrollers to revert multiple edits with a single click. It is commonly used to revert blatantly unconstructive edits such as vandalism.

There is no way add a custom edit summary when using rollback; instead, a summary such as "Reverted edits by $2 (talk) to last version by $1" will be used automatically.