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+keys, with modifiers, whilst Penpal is the active panel in After Effects - see below for details.
-keys, without any modifier keys.
-keys by also holding
-keys, by also holding
[0,0]is a zero'ed tangent. Disabling this toggle will make Penpal use absolute tangent values - in the same co-ordinate space as points - so a zero'd tangent will have the same values as it's parent point, and a tangent with value
[0,0]would be at the origin of the current Space, eg. the top-left corner of the composition in Comp Space.