Справочник Пользователя для 3com 3CRWXR10095A

If you click Yes, all objects and paper space outside the area you selected 
are removed and the image is resized to fill the removed space. 

Figure 1 on page 84 shows the same floor plan as Figure 2 (below) after 
cropping the paper space.

Figure 2   Floor Plan After Cropping

If you imported a DWG or DXF drawing, you might need to adjust the 
scale of the drawing because the units used in these drawings might not 
have a one-to-one correspondence to meters and feet. To adjust the scale 
of the drawing, you draw a line between two points of known distance 
and adjust the measurement.

1 Display the floor plan in the Content panel.

2 Click 

 on the toolbar.

3 Drag to create a line between two points. A dialog box appears. 

4 In the dialog box, type the actual distance between the two points.

5 Click OK.