BaseBase - FrameSet base Frame index

Description:
This attribute gives the index of the FrameFrame which is to be regarded as the "base" Frame within a FrameSetFrameSet. The default is the first Frame added to the FrameSet when it is created (this Frame always has an index of 1).
Type:
Integer.
Class Applicability:
FrameSet
All FrameSets have this attribute.
Notes:
  • Inverting a FrameSet (inverting the boolean sense of its InvertInvert attribute, with the astInvertastInvert function for example) will interchange the values of its Base and CurrentCurrent attributes.