Importing JPG

I have a complex diagram developed in Coreldraw (see below). I want to import it into Scrivener as a JPG so I can refer to it as I write on the subject of the diagram.

I have successfully imported the jpg as desired. But it is practically illegible in Scrivener even the the jpg itself is very clearly legible when I load it directly from the operating system (e.g., in Irfanview).

How can I resolve this problem?