Some vectorized PDF's are not supported in the IMPORT DRAWING option in ECDESIGN, but ECDESIGN also supports JPG image so when you have a drawing which is not supported, please follow the instructions below.
You can save anything on your computer screen by using any print screen software.
New Window version have the so called Snipping Tool included. The Snipping tool allows you to save any part of your scren as a JPG image.
For more information on the Snipping Tool, click here.
Here is also a video from Microsoft showing the Snipping Tool and how it works.