Command: usage

Usage:
usage  command

The command usage shows a brief description of the specified command and its options in the Log. See also: help, log, command usage conventions

Examples:

usage set
usage volume gaussian

The usage descriptions in the Log include the following terms for commonly used target specifications:

• atoms - atomic models and/or their subparts (atoms, residues, chains, etc.)
• objects - could include atomic models, parts of atomic models, or other kinds of models
• models - models of various types
• structures - atomic models
• surfaces - surface models
• volumes - volume models

Arguments shown in the descriptions as optional non-keyword arguments can be specified with keywords instead, which gives more flexibility as to their placement in the command. For example, the description from usage turn starts with:

turn [axis [angle [frames]]] ...

... in which axis, angle, and frames are optional non-keyword arguments. Alternatively, any of them could be given instead as a keyword option anywhere in the command. For example, the following two commands are equivalent:

turn y 90 model #4
turn model #4 axis y angle 90