How do you make a team in a roblox game with robloxstudios 2012 update?

You open up Roblox Studio.

Then , if you haven't got 'Explorer' up , go to 'View' and Click 'Explorer'.

Then Click 'Teams' once and click 'Insert' at the top of the screen.

Then Click 'Object' and Select 'Team' and press OK.

You can edit that team with the 'Properties' which you can also find in View.