LAYOUT lets you modelize an entire layout from instance-
specific to layout-specific geometry. 

Once you modelize a drawing layout, you cannot change it
back, so you should first use COPY to make a backup copy
of the layout in case you make a mistake.

CADKEY asks you to confirm that you want to modelize the
layout; choose YES or NO.

If you choose YES, CADKEY modelizes the layout. Nothing
appears to change, but CADKEY deletes all of the instance-
specific entities in the layout and replaces them with
layout-specific entities.

If you choose NO, CADKEY returns you to the MODELIZE menu 
without modelizing the layout.

If you want to make sure that CADKEY modelized the layout,
choose DETAIL, LAYOUT, SET, SHOWINST. If CADKEY does not
highlight the entire layout, it's layout-specific 
geometry. That is, CADKEY modelized the layout correctly. 
