P. Plot Using the Copy Picture Option

Highlight the window containing the diagram that you wish to plot.
This can be done by making sure the title bar of that window has the color which indicates that it is in focus.
Select Edit > Copy Picture.
Open a graphics program capable of cropping the graphics image to your needs (e.g., Microsoft Paint, Corel PaintShop Pro, Adobe Photoshop, etc.).
Paste the clipboard contents into an empty file in this program.
The drawing from the STAAD window is pasted in that program.

Alternatively, you can also copy graphic contents of the View window by using the <PrtSc> (Print Screen key).