Tempmod allows main owners and owners to promote guests and members to moderator for any duration of time, up to 24 hours. Note that you must be an owner or above to use this power.
Temporary moderators that are signed in while their moderator rank expires will remain a moderator until they sign out and in (including changing name, avatar, and homepage) or by attempting to use any moderator ability; such as banning, demoting, kicking or promoting. They will become a permanent member afterwards.
Temporary moderators are not able to make permanent members. If a temporary moderator attempts to make a user a member, they will instead make the user a member for one hour, even if the temporary moderator does not have Tempmem. However, the temporary moderator will still be able to use Tempmem. The maximum amount of time that a temporary moderator can ban by default is 6 hours, however this can be extended with GControl.
Start a private chat with the user you want to make a temporary moderator and type /m followed by the duration of time you want to make the user a temporary moderator for (in hours).
Example: Sending /m12 in a user's private chat would make them a temporary moderator for 12 hours.
Note: The user will be made into a permanent moderator if you do not specify a time.