node edit

I created a male toolpath and then adjusted the lead-in positions in node edit mode. Then I remembered I wanted to change to sharp corners. Can I get back to the window with the Basic and Lead-in/Lead-out tabs or do I have to delete the toolpath and start over?

One of my students was designing his project and has changed a setting where when we double click a line to edit the nodes none of them show up. I know it is probably a simple fix, he just clicked or changed a setting. Can anyone assist? It would be greatly appreciated, Thank you