Depending on the result (in terms of resolution) you want to get, there are two possible ways:
Option n.1
Go to More image settings > Display > Visible Edges
Option n.2
1) Render without visible edges (just untick More image settings > Display > Visible Edges)
2) Click Save Image To File
2) Go to File > Export > Common File Types > Visible Edges (*.hln)
3) Customize the settings and then click Export
4) Open the HLN file containing the edges
5) Go to Key-in
6) Type active background
7) Select the render without visible edges saved in step 2
8) Go to View Attributes and activate Background by clicking on it
9) Go to Saved Views, double click on the HLN file, then select Aspect Ratio from the menu
10) Fit view
IMPORTANT NOTE: With Option n.2 you can edit Color, Line Style, Line Weight and Transparency. However, you can't neither zoom in, nor zoom out, nor move the view around.
https://learn.bentley.com/app/Public/ViewLearningPathDetails?lpId=111389