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When placing a PMI/Drafting dimension inside of the part, the extension lines
are not created.
Solution
The Extension line display is determined by the selection when creating the
dimension. If the attached geomety is collinear with the extension lines, the
extension lines will start from the End Point of the attached geometry.
For example on a View of a Block feature, when creating a Horizonal dimension
and selecting the end points of the Vertical edges, the Extension lines will
not extend inside the part. They will Start when the dimension is extended
away from the part.
To get the Horizonal dimension extension lines to display, select the
Horizontal edge, then drag the dimension inside the part.
Notes and References
Hardware/Software Configuration
Platform: INTEL
OS: windows
OS Version: 764sp1
Product: NX
Application: PMI
Version: V8.5
Function: DIMENSION
Ref: 001-7177075