Bad Screenshot Quality after printing. How to avoid?

Hello, 

for my Thesis i use Screenshots of my models in HyperMesh.

I create the Screenshots by Pressing CTRL + F1/F2.

Then I Import them as deafult data type (.bmp), Import them in PowerPoint (adding description), copy the edited screenshot with text from PowerPoint to Word, convert to .pdf and print it.

I made sure to disable compressing Pictures in PowerPoint and Word. But my Screenshots still have the blue fog/cloud around the coordinate System and geometries.

How do i make clean screenshots in better Quality?

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