Autotek autocad raster design 2010 用户手册

prompted to enter subsequent endpoints to create a single polyline with
multiple segments.

After you select a raster line to vectorize, the AutoCAD command line displays
a number of choices. You can select another entity to vectorize using the
one-pick method, or you can use any of the following options on the vector
line segment you just created:

■

2P, to select another entity using the multi-pick method.

■

Angle, to adjust the angle. You can enter an angular value, or match the
angle of another vector line.

■

Length, to adjust the length. You can enter a length value, or match the
length of another vector line.

■

Undo, to remove the line.

If you used the one-pick method to select the raster line, the following options
are available to modify the vector line segment you just created:

■

Start, to change the start point.

■

End, to change the endpoint.

■

Switch, to reverse the direction, moving the start point to the other end.

■

Trim, to shorten the line by clicking an intersecting vector entity to trim
to, or by clicking another entity that, if extended, would intersect the line
you are trimming. ProdNameShort moves the endpoint to the apparent
intersection.

■

Extend, to lengthen the line by clicking an intersecting vector entity to
extend to, or by clicking another entity that, if extended, would intersect
the raster line you are extending. ProdNameShort moves the endpoint to
the apparent intersection.

NOTE To make the most efficient use of vectorization tools, you should adjust the
settings on the 

 (page 362) tab on the Raster Design Options dialog

box.

TIP Use raster snapping to make picking points on the raster entity you are
converting easier. For more information, see 

 (page 237).

208 | Chapter 8   Converting Raster Entities to Vector