[ccp4bb] sodium ion on a 3A map?

Hi, I am currently working on a 3A map and am wondering how to tell a sodium ion from other ions or water on this map. Any tips? Thanks, Brenda

[ccp4bb] slab command of Windows povscript

Hi, I am trying to make figures using the Windows version of povscript. However, it doesn't seem to recognize the slab command. The error message is: Error: syntax error: line number ? in file ?, at "slab". If I skip the slab line and let the software automatically calculate a slab number, it wo