Settings XYZ Scale command

This command gets you the Scale Dialog Box, in which you set the project’s size, scale, units, tolerance etc: You can also use the AutoScale command.

Max scale value of XYZ axes Enter the number of arbitrary 3D units between the origin and the ends of the axes. Default is 150.

Description of XYZ units Describe your 3D units --- e.g., millimeters, 100 centimeters, meters, feet, 1000 miles, etc.

Groundplane grid interval Spacing of the groundplane grid lines in 3D units. Default is 10.

Vertex tolerance Vertices closer than this are considered identical. Default is 0.001 3D units.

XYZ Increment per keystroke The number of 3D units to move a selection in the X, Y or Z direction with each keystroke. Default is 1. Can be reduced to help achieve accurate interfacial angles

Snap Mode grid spacing Spacing of the invisible grid for positioning vertices in Snap Mode. The default is 1 3D unit.

Size of vertex/edge handles Number between 1 and 6 for initial size of handles & vertex diamonds. Default is 3.

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The number entered into the first field is important. It sets the size and scale of your project. For example, a 3D model of a typical house would require this number to be set at about 30, if dealing in meters, or 100 if dealing in feet. That would allow objects as wide as 60 meters, or 200 feet, to fit within the axes. Objects can be larger than the axes, but eventually the limits of the viewing volume will be reached, and clipping will occur. Also, objects much larger than the axes may be too big to view as a whole in orthographic projection mode . Choose your units to avoid axes larger than 15,000 or smaller than 1.5. Numbers between 10 and 1000 are probably best.

The scale of a project can be reset at any time. For example, you may require more space within the axes to extend your house. Bear in mind that if you make a large change in scale your house may become a small dot in the middle of a huge groundplane, or you may become lost inside a giant’s house (clue --- the background becomes a lighter shade of blue). Of course, the house can then be enlarged or reduced by using the Grow and Shrink command, or more accurately the Resize Command.

The increment per keystroke can be reduced for better precision in placing vertices with the arrow key, or achieving exact interfacial angles.