When you select a term in the source or target pane, it would be really nice if there was a copy function in the context menu. I have been using my mouse a lot more lately (for certain things) and keep having to hit control + C on my keyboard, whereas I would be able to do it with the mouse alone if this were implemented.
See the copy, cut and paste buttons in the target segment toolbar. You might try to "Reverse target segment toolbar" in the View menu to have it closer to the mouse.
Forgot about those! Thanks!