Читать книгу AutoCAD For Dummies онлайн

132 страница из 139

3 If the current line width isn’t zero, you can change it to zero by typing W to select the Width option and then entering 0 as the starting and ending widths, as shown in this command-line sequence: Specify next point or [Arc Halfwidth Length Undo Width]: WSpecify starting width <0.0000>: 0Specify ending width <0.0000>: 0Specify next point or [Arc Halfwidth Length Undo Width]: Despite what you may think, a zero-width polyline segment isn’t the AutoCAD equivalent of drawing with invisible ink. Zero width means, “Display this segment using the normal, single-pixel width on the screen, and print as thin as possible.” How can you tell when your pen has run out of invisible ink? You can see the writing.

4 Specify additional points by clicking or typing.After you specify the second point, AutoCAD adds the Close option to the prompt. The command line showsSpecify next point or [Arc Close Halfwidth Length Undo Width]: What you do next can get a little weird. If you invoke the Close option after selecting only the first and second points, PLine doubles back on itself and creates the second segment back over the first, unlike the Line command, which won’t. Normal practice would be to not invoke Close until you have created at least two non-collinear segments.