Positioning mode values for generative views inside the sheet.
The positioning mode for a given sheet determines the generative views position behavior when an update is requested.
Notice:
the position of generative views is usually the position of the image of the center of gravity of the 3D data.
catFixedCG
the position of the image of the center of gravity of the 3D data remains the same after an update.
catFixedAxis
the position of the image of the center of gravity is modified so that existing geometries don't move after an update.