Design Review Cannot Compare
Design Review Can Compare
Polyline changes (points added, changed,
and deleted, line pattern, line weight, line
end cap, and line join style)
Changes to 2D polylines (polyline colors,
fill colors, or fill patterns such as hatch pat-
Polygon changes (vertices added, changed,
and deleted, edge pattern, and edge
2D sheet scale or dpi
Text (insertion point, text string, font name,
and font size)
Metadata from object and sheet properties
Raster images (image size or pixel colors)
Markups (text boxes, freehand, callouts,
measurements, stamps, or symbols)
Unexpected Comparison Results
Occasionally, comparing DWF files may produce some unexpected results.
Since DWF is a published file format, DWF files are susceptible to the output
eccentricities of publishing programs.
For instance, while testing Design Review comparison capabilities, an instance
was found where Autodesk Inventor published a polyline differently in a
second DWF file. In the first DWF file, the polyline was a single set of points.
When publishing a subsequent DWF file, the same polyline was published as
two separate sets of points. Although the polyline had not noticeably changed,
and it displayed and printed the same in both DWF files, the subtle difference
was detected during comparison. Be aware that Design Review will identify
all geometric differences between two DWF files, whether the difference is
made intentionally by a designer or unintentionally by an anomaly in a
Another situation that may lead to unexpected results is when a DWF file
being compared contains both vector (geometry) and raster (pixels) content.
232 | Chapter 3 Using Design Review