The logic line is used to represent the logical relationship between pages.
Add logic line
Select one page and drag the left arrow to the other page to create a logic line. Double-click on the logic line to add your description.
Delete a logic line
Select the logic line, right-click, and select “Delete” to delete the selected logic line. Or, press the “Delete” key after selecting the logic line for deletion.
Show/hide a logic line description
Right-click on the canvas, and choose "show/hide logic line description" in the pop-out menu. Or press the shortcut S to hide/show logic line description.