This numbering is used for the VerticalLevel property of .SetSymbolProperty and .SetToolboxSymbolProperty. It will set the vertical offset (from the middle of the task row) to one of these numbers. The numbers are out of order to keep the numbering in-sync with past versions.
Note that the property VerticalLevel2 is also available and uses a more common sense numbering schedule.
VerticalLevel == 9 : 5 levels above
VerticalLevel == 7 : 4 levels above
VerticalLevel == 5 : 3 levels above
VerticalLevel == 3 : 2 levels above
VerticalLevel == 1 : 1 level above
VerticalLevel == 0 : middle
VerticalLevel == 2 : 1 level below
VerticalLevel == 4 : 2 levels below
VerticalLevel == 6 : 3 levels below
VerticalLevel == 8 : 4 levels below
VerticalLevel == 10 : 5 levels below
Note:
VerticalLevel = -1 will reset the symbol level to the Toolbox default.
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