assign - assign a button to a specified object
SYNOPSIS
assign userid button
DESCRIPTION
Attempt to assign the specified object to a button. If the
assignment is valid then the button is moved to the object
position. The userid corresponds to the id given by the
user to each one of the objects of the star field.
SEE ALSO
move(n), park(n), view(n)
AUTHOR
R.Cantarutti, National Optical Astronomy Observatories