[PyMOL] symmetry and density maps

[Richard]

I just loaded a CCP4-format density map and am having a little  
trouble getting the map to cover the area of interest on the model.  
The displayed map covers the entire unit cell, but the model I am  
working with is located at the bottom corner with many of the atoms  
spilling over into neighboring unit cells. When I try to generate an  
isomesh around the residue of interest, nothing appears, because that  
residue is not in the main unit cell. I suppose I could generate lots  
of symmetry neighbors using symexp and delete the ones I don't want.  
Would be better if the isomesh automatically applied symmetry when  
extending outside the main unit cell. Perhaps I am overlooking some  
controls. Is there a better way to solve this problem?

Richard Gillilan
MacCHESS
Cornell