Arrows can be added to any row.
Define the features of a newly created arrow with the Arrows options dialog:
Menu: Diagram | Arrow options
All these options, except for arrow head length & height, are default values, that can be further adjusted on a per-arrow basis. Arrow head length & height values apply to ALL arrows in a diagram.
For a consistent look, you can change
Arrows within a row are managed through a dialog box listing all the row's arrows, and allowing you to add, edit, duplicate or delete an arrow. Each arrow is shown in its own tab, like a notebook. An arrow's tab shows its "From unit".
To manage the arrows of a row, you need to select the row first (either by clicking on its name, or by pressing the S key and navigating to the row with the Up/Down/Home/End keys).
Two types of arrows are supported, across and along arrows.
When a row is deleted, all the arrows that use it as either the start or end point, are deleted too. This includes any arrow that belongs to that row, any Across arrow that ends in that row, and any Along arrow whose guideline ends in that row.