TYPE: Object State
TITLE: Parent Operation

The Parent operation is used to parent or unparent objects.  Many children
can be parented to another object, or unparented, at once.  To apply this
operation, select the child objects and right-click, then select the parent and
right-click, or right-click again without any selection.  If a parent was
selected, the children will now be parented, if no parent was selected, then the
children will now be unparented.

The "keep child positions" rules are applied based on the choice from the 
Options menu.  Depending on the setting, the children will either "Never" keep 
their position, "Always" keep their position, or behave according to the "Keep
position when parenting" flag in the object.
