Select CAD> Lines> Sun Angle, then click anywhere in floor plan view to open the Sun Angle Specification dialog and create a new sun angle. See "Sun Angle".
You can also open the Sun Angle Specification dialog for an existing sun angle by selecting it and clicking the Open Object 
edit button.
Latitude is measured North or South of the equator.
Longitude is measured West or East of the Greenwich meridian.
Common values for latitude, longitude can be found in any atlas.
Date - Enter a date for each arrow you create.
Time - Enter a time for each arrow you create. Define whether or not it should be adjusted to allow for Daylight Savings Time.
Time Zone - Specify the time zone.
The previous values default to the settings on the Special CAD panel of the Preferences dialog.
In the lower part of the Sun Angle Specification dialog is a section displaying the calculated angles.
The Solar altitude angle displays the angle of the sun in degrees above the horizontal plane.
The Solar direction angle shows the angle between true north and the sun's direction. This is the angle the Sun Angle arrow displays in floor plan view.
This angle is always measured relative to north. North is defined by a user specified North Pointer 
. If you have not created a North Pointer, north is assumed to be straight up in the floor plan view. If a North Pointer is drawn, or the direction of an existing North Pointer is changed, Sun Angles and their shadows automatically update.
Always Update - Select the check box to have the program update the shadow for this arrow whenever any of the defining information is changed. When checked, it slows the system down while the Sun Angle Specification dialog is displayed. If this is not checked, click the Make Shadow button to generate a new shadow based on the new information.
Show Date on Sun Angle - Select the check box to have the date and time display on the Sun Angle arrow in the floor plan view.
Auto Rebuild Terrain - Select the check box to rebuild the terrain automatically whenever you create a sun shadow.
If the Auto Rebuild Terrain check box is checked, then if you rebuild the sun shadow, the terrain automatically rebuilds as needed before the sun shadow generates. If this check box is unchecked, you are prompted to rebuild the terrain.
Note that when you use the Build Terrain command in floor plan view, all sun shadows in the plan are automatically updated.
Length of Plan Symbol -
Enter the length of the Sun Angle arrow for floor plan view.
Make shadow - Click the button to calculate the shadow on screen. The shadow is a polyline filled with a hatch pattern derived from the Sun Angle direction.
No shadow generates if the sun is not above the horizon or if the sun is so low on the horizon that the shadow would be extremely long. If no shadow appears, reset the time to noon to test the function. If the shadow appears, your original time setting was too early or too late to generate shadows.
Note that the Make Shadow option does not affect the Render view. To turn shadows on and off for the Render view, use the Render tab.
Delete shadow - Removes the sun shadow generated using Make Shadow from the floor plan view.
You can define if the Sun Angle is used as a light source in render views. Set the parameters here if you want to use the Sun Angle as a light source in render views.
The settings defined on the Render Data tab are not related to how the shadow is displayed in floor plan view. They only affect render views.
On - Check this box to select the current Sun Angle as a rendering light source. If there is more than one defined Sun Angle, the renderer selects the first Sun Angle that is defined as On. To make sure you are rendering the correct Sun Angle, make sure all others do not have this box checked.
Casts Shadow - Check here to have this light source cast shadows. These shadows are similar to the shadow shown in floor plan view, but they may render differently based on other light sources.
Intensity - Use this slider bar to define the relative intensity of the light source. Time of day as set on the Earth Data tab, does not affect how the Sun Angle renders as a light source, but this does.
Color - Select a color for the light source.
For information about the Line Style tab, see "Line Style Tab".
For information about the Fill Style tab, see "Fill Style Tab".
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