Remove unneeded arguments and update documentation.
Remove unneeded arguments and update documentation.

cjh1/tomviz,mathturtle/tomviz,cjh1/tomviz,thewtex/tomviz,mathturtle/tomviz,thewtex/tomviz,OpenChemistry/tomviz,OpenChemistry/tomviz,cjh1/tomviz,cryos/tomviz,mathturtle/tomviz,OpenChemistry/tomviz,cryos/tomviz,thewtex/tomviz,cryos/tomviz,OpenChemistry/tomviz