Cystoscope network visualization

I am a beginner in Network analysis and i am facing two major issues in my analysis:

1-I used STRING for protein-protein interaction analysis of my DEGs and I got a huge network even if I take the highest confidence edges for upregulated genes only using String. is there any application in Cytoscape to visualize such a network or filter the nodes to identify hub proteins?

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2- I did the Network analysis (NetworkAnalyzer) in cytoscape i got different id for my proteins from those i used as input for STRING analysis. How can I convert the ids and identify my proteins?

string input:

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Cytoscape:NetworkAnalyzer (edge table) output:

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Thank you in advance!




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