User Guide
AUTOCAD 2010 PREVIEW GUIDE
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How do you create zero-length geometry or empty text objects? Usually by accident! For example, you might
grip-edit a line and accidentally snap one endpoint onto the other endpoint. Or you might begin creating an
mtext, enter a space, and then cancel out of it. The mtext object still exists but you can’t see it because it is
nothing more than a space. After performing the Purge operation, AutoCAD will report how many zero-length or
empty text objects it purged. The same functionality is available at the Command line using the -PURGE
command.
Viewport Rotation Tools
The new VPROTATEASSOC variable enables you to control the rotation of a view within a layout viewport.
When you rotate the viewport with VPROTATEASSOC set to 1 (the default), the view will also rotate to maintain
its orientation relevant to the viewport. When it’s set to 0, the view within the viewport will not rotate even
though the viewport itself does.
Original Viewport VPROTATEASSOC=0 VPROTATEASSOC=1
Figure 46. Viewport rotation
External References
AutoCAD 2010 provides a consolidated interface and increased flexibility for working with externally referenced
file formats, including DWG
TM
, DWF
TM
, DGN, PDF, and Image files.
Geographic Data
Attach externally referenced drawing files using geographic data. If both the host drawing and the external
reference drawing have a geographic location, a new option in the External References dialog box enables you
to locate the attached xref relative to the host drawing using Geographic Data. A similar option is available in
the Insert dialog box.
Reference Tools
The Reference panel on the Insert tab of the ribbon provides tools for you to attach and modify externally
referenced files. Use the Attach tool to select a DWG, DWF, DGN, PDF, or Image file and specify attachment
options. Additional tools enable you to clip a selected reference, adjust its Fade, Contrast, and Brightness,
control its layer visibility, display reference frames, snap to underlay geometry, and adjust xref fading.
Figure 47. Reference ribbon panel