 Allegro 5.0 - Lab for Delete Subclass

   The purpose of this lab is to become familiar with the process Deleting Subclasses.  It will also show how to select Negative Artwork for subclasses with this requirement.

 1) Select  Define > Subclass  command.

 2) Move the "Define Sublass" form by pressing the right mouse button in the form frame and dragging it below this help box.

 3) Pick Class "Etch" selection box in "Define Subclass" form.

 4) In "Define Etch Subclass" form, there are two errors that need to be corrected.
 5) First, the +12 subclass was entered in error and must be deleted.  Place the cursor in the selection box to the left of the +12 text.  Pressing and holding the middle mouse button, select "Delete" from the popup issued.  The +12 subclass is now deleted.

 6) Second, the GND subclass needs to have Negative Artwork generated.  "Turn on" Negative Artwork for this subclass by picking the "check box" in the Megative Artwork column for the GND Subclass.

 7) Press <F1> to continue to next frame ...
