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On the compare surfaces dialog box, select the over-lapping surfaces
to be compared, then press Next (Figure 3-62 on page 3-43).
• Design Surface – a design surface has been selected by default
from the drop-down list.
• Existing Surface – select the surface to compare from the drop-
down list. Remember to choose two over-lapping surfaces.
The preview dialog box displays the elevation differences between the
two surfaces (Figure 3-63 on page 3-43). Press the +/- buttons to
zoom in or out on the image, or press down on the screen and drag the
image around. Press Finish to continue.
Figure 3-63. Compare Surface Preview Dialog Box
P/N 7010-0628
Figure 3-62. Compare Surfaces
Surface
3-43
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