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  This saves time.  If you want to see the actual smoothly-curved line, use the REGENerate command.

15.4. Pattern making operations often require MOVEing lines or pattern pieces or marking symbols that are overlapping or ERASEing one of the overlapping lines.  After the command has been executed it will appear on the screen as though both objects or lines are gone.  Use the REGENerate command to cause the bottom one to reappear.


    REDRAW is a command similar to REGENerate.  It runs faster than  REGENerate because the computer only thinks about the part of the drawing that is showing on the screen and uses the short-cut of drawing faceted lines instead of smooth curves.  This way it redoes the drawing on the screen more quickly than REGENerate.  It is useful when you want to quickly remove left over vertex marks from the screen or to reveal a line that was on a lower layer of the drawing that appears to have "disappeared" because you MOVEd the line on top of it.
    You will probably not notice a major difference between the two commands unless you have a very large drawing. Back in the “olden days” when we were running on 286 and 386 Mghz computers, this was an important difference.


    CPM has a very useful function known as BLOCKs.  All the Instruction and Marking Symbols included with CPM are INSERTed as BLOCKS into your pattern drawing. If you wish to bring a pattern created in a different drawing file, into your current drawing file (for layout, perhaps), you will INSERT it as a BLOCK into your drawing.  You can create any drawing object you wish to use as a BLOCK, save it as a drawing file and reuse it any time you want.
    Anytime you INSERT a BLOCK into a drawing file, that BLOCK is added to the drawing file database. Even if you ERASE the image of the BLOCK from the drawing file later on, the drawing file database keeps the BLOCK image in its database unless you use the PURGE command (found on the FILE pop-down menu) to remove it from the database.  

To create a drawing object to be used as a block in a specific drawing file, you need to begin by created the drawing object on the drawing page of the file you plan to use the block in.

17.1. For example:  PLINE an X.  Then SELECT Create Block for inserting on the DRAW pop-down menu. The Block Definition menu window will pop-up. First give the block a name by writing it in the Block name: window. Next CLICK the Select objects button. The Block Definition menu window will disappear.  SELECT the X you have just PLINEd.  When you stop SELECTing by CLICKing  ENTER, the Block Definition menu window will reappear.  Now CLICK the Select point button.  The Block Definition menu window will disappear again.  Use SNAPTO inter and CLICK the cursor on the crossing of the X. The Block Definition menu widow will reappear. You will notice that the