Topo surface lower points cannot be selected

[Anonymous]

As shown in the attachment, when I tried to edit the surface, the points on the right, which is the lower side cannot be selected. And I wasn't able to change the area of the surface on this right side.

[barthbradley]

Select the Point, look on the Options Bar and enter a new "Elevation" value for the Point.  

...what a minute. Are you wanting to move the Boundary Points outward to increase the Surface Area of the Toposurface? If so, go to a Plan View and Edit Surface and drag the Boundary Points outward.  

[Anonymous]

the problem is that I cannot select those points for some reason

[barthbradley]

Can you do them one at a time?  

[Anonymous]

No, not really. All of the points on the left can be selected. But the ones one the right cannot.

When I first open the edit surface, it mentioned

portions of the topographic surface or points on the surface may not be visible in this view due to clipping by the view

[barthbradley · Accepted solution]

Set your Plan View Range's Top and Bottom and Depth to Unlimited.