Please note : This help page is not for the latest version of Enterprise Architect. The latest help can be found here.
Change the Top Margin
In order to change the top margin of a Sequence diagram from the default 50 units, right-click on the diagram and select the 'Set Top Margin' option. You can set the top margin to any value between 30 and 250 units. You can then use this space to, for example, add Note or Text elements to provide documentation on the diagram.