Me and my class mate are currently working on our masters thesis. To keep it short, we are mapping an ecosystem. This is done via excel files and then importing this into Gephi to produce a visual result.
We have been looking into Gephi and so far learnt a lot, but we still have lots to learn. We are looking to publish this thesis as a paper which are only black and white. Which means the color of the node type might be a visual problem. So to the question to Gephi proffessionals:
(TLDR:) Is there a way to change the node types into rectangles and triangles instead of only circles?

I did try to import the image, but in the preview it doesnt look too good. This is a draft of our result: https://imgur.com/a/uzrgO