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как в Corele можно использовать, с вкл.OSNAP...
Construction Line (Free!)
The Construction Line toolbar contains tools to quickly create construction lines on a separate layer.
It also has tools to print the model without the construction lines, and zoom to the extents of the model excluding construction lines.
Included tools:
Horizontal construction line
Vertical construction line
Angled construction line
Construction line through two points
Parallel construction line
Offset construction line
Configuration of construction lines
Zoom Extents (ignore construction lines)
Print (ignore construction lines)
To use the toolbar:
Download the ConstructionLines.ws and save it.
Start Rhino 2.0.
From the Tools menu, click Toolbar Layout.
In the Toolbar dialog box, click File, then click Open....
Open ConstructionLines.ws.
Click the toolbar buttons to activate the commands.
Note: These commands only work in the Top and Perspective viewports due to limitations in the scripting tools used to write the commands.
Type:
Toolbar Layout
Download:
ftp://ftp.mcneel.com/pub/rhino/plugins/ConstructionLines.WS (21 KB)
Rhino version:
2.0