sel all | selects all objects
| sel none | clears current selection
| sel name [objNameBegin] [ - objNameEnd] [=on|off|tog]| selects object by name, name format: <pdb>[.chain[.res]] (note: res can be full name or just sequence number)
| sel idx0 [indexPosBegin] [- indexPosEnd] [=on|off|tog]| selects object by 0-based index, index format: <pdb>[.chain[.res]], -1 = 'final index pos'
| sel idx [indexPosBegin] [- indexPosEnd] [=on|off|tog]| selects object by 1-based index, index format: <pdb>[.chain[.res]], -1 = 'final index pos'
| sel sphere | Selection Sphere commands
| sel level <down|pdb|chain|res|node> <indexPos> [=on|off|tog]| selects an ancestor of the residue specified by index pos, depending on level arg (internal use).
| sel report | Selection Report commands
| sel set | Selection Mode commands
| sel display | Selection Display commands
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