dropping where needed. The dimensions of the Zone can be altered by manipulating the
Zone directly, or by right-clicking the Zone and selecting Properties.
BTWYG drawing with a Cylindrical Zone selected
To draw a spherical zone
In BTWYSIWYG CAD mode, click the Wireframe view tab.1.
From the BlackTrax menu, choose BT Zone and then choose Spherical Zone.2.
Result: The New Spherical Zone window appears.
In the New Spherical Zone window, in the Horizontal Radius field, enter in the horizontal radius of3.
the Zone.
In the Vertical Radius field, enter in the vertical radius of the Zone.4.
Note: Alternately, Zone dimensions can be created by selecting Interactive. The Zone is then
drawn in Wireframe view, and dimensions are automatically recorded.
Lock Ratio controls the aspect ratio of the radius. This feature is enabled by default. To disable,5.
clear the Lock Ratio checkbox.
Number of Segments controls how many segments make up the radius of the spherical Zone. The6.
default is set to 12. To change the number of segments, clear the Use Document Defaults
checkbox. Enter the new segment number in the field.
Note: The maximum number of segments allowed is 40.
In the Zone Name field, enter a unique name for the Zone.7.
Click OK.8.
Result: The Zone will be inserted into the Space. It can be repositioned by dragging and
dropping where needed. The dimensions of the Zone can be altered by manipulating the
Zone directly, or by right-clicking the Zone and selecting Properties.
BTWYG drawing with a Spherical Zone selected
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