There is currently no option to control the slab size for slabs made with "measure rotation #0 #1 showslabs true". The size of the slab depends on the distance of the center of the bounding box of the first model (#0) to the rotation axis. The slab passes through that center point. You can edit Chimera file chimera/share/MatchDomains/__init__.py changing the line e = 2 # Factor for enlarging square to produce a smaller slab (e.g. e = 1) the restart Chimera. I'll add a feature request to allow the measure rotation command to take a slab size option. Tom

Hello,

I am trying to measure rotation using the "measure rotation showslabs t" command in chimera which gives very large slabs. How can I make the slabs smaller ?

Any help gratefully appreciated. Thanks