To assign an object to a group, you can simply rez it while wearing the tag of the group.
Alternatively, if the object is already rezzed, you have to:
- Right click on the object and choose “Edit”.
- While in edit mode, look for the “Group” detail in the “General” tab.
- If the set group is wrong, click on the button with a wrench.
- Select the name of the group you want to assign the object to.
Note: assigning an object to a group is different from deeding it.
If you need to deed your object, please refer to this guide.