In Finale, a caesura, or “railroad track” (example), is an articulation; see Articulations.

Tip: If you make a habit of attaching a caesura to the note that precedes it, you’ll always remember where to click in order to see its handle. When you create a caesura using the Articulation Designer dialog box, you can use the H: and V: positioning text boxes to place it automatically just to the right of the note it’s attached to.