A logic line is used to represent the interaction/jumping relations between pages.
Add Logic Lines
After selecting a page, drag from the arrow on the page's right-hand side to the target page. Now a logic line has been created between the two pages.
Double-click on the line to add a description.
Delete Logic Lines
Select a logic line, right-click, and select “Delete” to remove this logic line. Or, select the logic line and press the Delete key instead.
Show/Hide Logic Line Description
Right-click on the canvas, and select “Show/Hide line description". Or press the shortcut "S".