Usage:
select all

Usage:
~select all

Usage:
select model_number(s)

Usage:
~select model_number(s)

Usage:
select atom-spec

Usage:
~select atom-spec

The select command has been enhanced in Chimera and now has dual functions:

• The older function, indicated by the all keyword or model_number(s) arguments, is to select a model or models for subsequent move, rock, roll and turn commands as well as interactive mouse manipulations. In Chimera, this type of selection is more often called activation and should not be confused with the selection used to specify atoms for subsequent operations (which is the newer function; see below). The keyword all indicates that all models should be activated. ~Select all will then revert to the previous activation state. This feature is convenient for switching back and forth between moving models relative to one another and global motion of all models. The model_number(s) argument should be expressed as one or more model numbers or ranges of model numbers separated by commas, not preceded by #. The activation status of models can also be controlled in the Model Panel or by toggling the boxes under the Midas command line.
• The newer function, indicated by an atom-spec argument, is selection as used in Chimera to specify atoms for subsequent operations. An atom specification begins with the #, :, or @ symbol. Lack of any argument is interpreted as specification of all atoms (equivalent to #). The effect of select on an existing Chimera selection depends on the selection mode. ~Select removes the specified atoms from the selection regardless of selection mode.

Examples:

select #1

select 1,5-8

~select :/isHelix