Well looks like i find a new feature for CHU this is about Deleteing messages.if there is some specific messages that u dont want to delete u cant use Delete All Message feature.so u have to delete them one by one which takes a lot of time. This new feature is like AUTHOR ADMIN when u want to submit a new FAQ it says ''Hold Ctrl to select multiple platforms'' we can use this for deleting messages too. it can be like ''Hold Ctrl to delete multiple messages''
I think he means the "checkbox" idea that several members have already suggested in the past. i.e. Selec which messages you want to delete via clicking a checkbox, instead of individually deleting each one and/or clicking the "delete all messages" button.