There may come a time you need to change the options of multiple users at once. Below is a tool in WHM that can help! With this, you can change the reseller, theme, start date, package, and locale/language of one or more users at a time.
In WHM >> Multi Account Functions >> Modfiy/Upgrade Multiple Accounts
You can select one or more users.
For more documentation on this tool, please refer to the cPanel/WHM documentation article below.