All of the lines have “handles” (little red circles) in the middle, and text labels have a little handle on their left side. Can I get rid of these?
A Yes, they disappear when you do any output, such as to printer, EMF/SVG file, or to the clipboard. They only exist on the screen for editing purposes. You can see this by going up to the menu “Control/Copy window to clipboard as bitmap” — all of the handles will disappear. Also, in “Control/EVE preferences…” dialog box, you can tick a checkbox to hide them, which is something that you might want to do if the diagram is to be read-only (this dialog box has some other checkboxes also to make the diagram fully read-only).