I NEED HELP!

[lilmissfit916]

hey this is my first time on here, and i need a little help. Does any one know what an xclip does? as well as what xref an elevation is developed from? thanks!

[Eddie]

8) XCLIP : is a feature to clip (trim download ) the xref you brought into your drawing.
It's a way of control how much of the xref is seen.

As for the second query..can you clarify this one please .....