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Intended for use in 2D slices of nD datasets, where the charts page through the dimensions. Page labels are given as a comma-separated list, or a vector of text vectors, with one element per dimension. They are drawn in the axis caption font in columns in the top left corner of the chart area.
ch.Set('mtop' 56) © Space for 3 page labels ch.Set('PLAB' 'France,Petfood,Budget,Junk')
See Barchart (in the RainPro workspace) for an example of use.
The page labels report a hotspot with id Pagelabels and a hotspot counter giving the specific label you hit. Your software could use this (for example) to put up a popup menu allowing the user to pick from the items of that dimension.