Usage:
focus [ atom-spec ]

Usage:
~focus

Focus adjusts the view and center of rotation based on displayed atoms, bonds, ribbon segments, and/or surfaces (possibly including items that are invisible). Any combination of atoms and surface pieces can be specified, but only those which are also displayed will be used.

Focus with an atom-spec:

1. adjusts the view to include the specified items that are also displayed
2. sets the center of rotation method to the center of view (like cofr view)

1. adjusts the view to include all displayed items (similar to window sans arguments)
2. sets the center of rotation method to the center of models (like ~cofr)

The center of rotation can also be controlled with the Rotation tool.

See also: center, cofr, window, the Actions menu