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So...what's N? I couldn't figure that out at all as the code is of course obfuscated for compactness.
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N is the number of states used by S. The states in S (which use the
macro option system) must go from 1 to N unless you want to waste action slots (which may actually be desirable if you just want to add to the built-in bars)
There's also an unused option, P for "Point", which sets the anchor point of the bar relative to UIParent (usually equal to the screen edges). It defaults to "BOTTOM", hence the descriptions of H and V. You can use any of the anchor points used by
SetPoint.