I need to meld the corners of wide lines.

Is that after it's printed ? 

You can try and change your performance level...

Hi Shane,

Those are sketch curves. So follow the directions in the help topic, select Sketch Curves in the Type of edge list in the dialog, and change the End cap style to either Round or Square depending on how you want the corners to meet. This is a document setting so it needs to be done in each drawing. If you want all new drawings to have the setting, make sure you make the change in your document templates and resave the templates.

Thanks,

Jim