gusaeiris

I'm new to Paint.net and the purpose I downloaded it is because I needed a better option to Paint for polishing graphs. I created the graphs using radio-tracking location data of marsh rats in Microsoft Excel. Now I need to finish the graphs for publication. I tried copying then in Paint and working on them, but I lost too much resolution. Now I decided to try Paint.net for the same purpose and I can't paste my graphics in it. Any suggestions? Is there any way I can make the formats compatible?