From The Document Foundation Wiki
How do I space the boxes in an organization chart regularly?
The procedure that makes it possible to align the boxes regularly in a drawing or presentation is called distribution.
Follow these steps:
- select the objects to be distributed (at least three);
- click the right mouse button to access the context menu and select or go to ▸ on the main menu bar;
- in the dialog box that appears, you can choose to align objects vertically and/or horizontally;
- click OK to confirm your choice.