E.g. In the following graph, the column/bar width and gap in top (layer 1) and bottom panels (layer 2, 3&4) can be set to set differently.
Check Column/Bar/Box Gap Across Layers on Layers tab of Page level so column/bars in overlapped layers 2, 3&4 will be organized together.
Set Layer 2 to not be linked to layer 1. Set layer 3 and 4 to be linked to layer 2 with straight 1:1 x-axis. So there are two sets, Layer 1 vs Layers 2, 3&4
Pick plot in 1st layer and go to spacing tab to set column/bar width and gap.
Pick plot in 2nd layer (parent of 2nd set of linked layers) to set column bar width and gap of layer 2, 3&4.
@GALL=1 by default, 0 is for old behavior
Notice that we need to be enable Column/Bar/Box Gap Across Layers if want to share same spacing setting
In older versions, the spacing tab is only enabled for 1st layer in whole graph and it will affect all layers. If setting the column/bar width on top panel to be narrower, the bottom 2 columns will be very thin.
