Attributes

If you aren't already familiar with attributes, please check out Roblox's explanation.

Starting a value name off with @ will let Tween+ know that it's an attribute. Other than that they work the same as usual properties.

Example:

local tween = TweenPlus(
	workspace.Part,
	{
		Position = Vector3.new(0, 10, 0),
		Color = Color3.fromRGB(255, 255, 0),
		["@Coolness"] = 10 -- Attribute named 'Coolness'.
	}
)