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Displayed Unit—Select the unit of measure to be displayed with 
the dimension. If you select Use Design Settings, the unit of 
measure selected in the Design Units field of the Grids & Units 
tab of the PCB Properties dialog box are used. This setting also 
appears in the Draw Settings toolbar. 

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Alignment and Position—These are where you set how the text 
appears in relation to the arrow. 

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Orientation—This is where you select the angle at which the 
dimension displays. 

The results of your choices are previewed on the tab. 

4.

To apply your changes without closing the dialog box, click Apply. 
Existing dimensions are not affected. To apply your changes and close 
the dialog box, click OK. 

Complete the following steps to set 3D viewer options: 

1.

Choose Options»Global Preferences

and select the 3D Options tab.  

2.

To change the background color in the 3D viewer, click on the shaded 
rectangle beside Background color. The Color dialog box appears. 

3.

Select the desired color and click OK in the Color dialog box. 

4.

Optionally, enable the Show Copper and Silkscreen while moving 
checkbox. 

5.

Set the Internal View Options as desired. 

The more space that you set between the layers, the easier they will be to view when 

you zoom in on the PCB in the 3D mode. Refer to the 

 section of Chapter 9, 

, for more information. 

6.

To apply your changes but leave the Preferences

dialog box open, 

click Apply. To apply your changes and close the Preferences

dialog 

box, click OK.