CUSTOM PATTERN MAKER - Chapter VIII - pg 77
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  use different formulas to calculate the curve.


15.3.5.  Click ENTER.  X(eXit) appears in <>s and is the "default command".)  This ends the PEDIT command.

NOTE: Be sure to FITCURVE a line before you PEDIT J(OIN) the rest of the pattern lines together.  After the pattern is J(OIN)ed, using FITCURVE or SPLINE will turn every pattern corner into a curve.  You do not want this.
    Remember that AutoCAD® uses the drawing short-cut of drawing curves as faceted lines.  When you use PEDIT J(OIN) all your seam lines back together it may look as though a FITCURVE or SPLINE line has turned back into a faceted line SELECT REGEN(ERATE) and you will see that it is still a curved line.

NOTE:  When you begin to J(OIN) a slashed pattern together, it will probably be made up of blue, green and black (white) lines.   The color of the first line you SELECT to J(OIN) is the color that the new J(OIN)ed line will be.


16.  TROUBLE SHOOTING A PEDIT(ED) POLYLINE THAT DOES NOT CLOSE PROPERLY

    If pattern does not automatically CLOSE the seam line, you will need to trouble-shoot to find the line segment joining that it not mechanically accurate and correct it.  Sometimes, you can force the pattern to CLOSE.  First, SELECT CLOSE and force the pattern to CLOSE.  You may or may not be successful in this.

16.1.    If you have CLOSEd the pattern piece and everything looks O.K., try OFFSETting a seam allowance.  If the seam allowance forms, you have nothing to worry about.  However, if you see only a tiny dash of seam allowance appear some where around the edge of the pattern. If the command prompt indicates that the OFFSET command was performed by returning to Select next object: without telling you anything else, look carefully for a dash.  Turn off the GRID so it is easier to see the dash.   This tiny dash indicates the position where there is a confusing vertex joining in the pattern seam line.  It should be just about perpendicular from the dash of seam allowance.  End the PEDIT command by ENTERing X(eXit).
OR    If a strange line cutting across the pattern piece appears after you have forced it to CLOSE, the first thing you need to do is end the PEDIT command by ENTERing X(eXit).  Then

 UNDO and ENTER to back up one command.  Pay close attention to where the "cut across" lines began and ended, because those places are probably where the drawing error is.
OR    Another option is to ERASE the pattern seam line.  Choose any point on the pattern with the "pick-box".  The segment that is not part of the Joined continuous seam line will not turn dotted and thus you will be able to see the point(s) where the error has occurred.