If you want to edit your account name in a certain group, you can follow the steps below:
1. Click on the group avatar
2. Click the button in the upper right corner
3. Select ‘Edit My Alias’
4. Enter the name you want to display in the group
5. Click the “Save” button
Please note that this name is only used for your display within this group. If you want to use this name in other groups as well, you will need to re-enter another group for editing.