How can IDEA quickly add class comments to existing classes?

after IDEA sets up the template for class comments, you can automatically add comments every time you create a new class, but how can existing classes quickly add comments according to the template?

Apr.17,2021

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b386c2-2c10b.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b386c2-2c10b.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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