You have to be the owner of the dashboard (created by you) to set the layout. Setting a dashboard's layout is quite simple and straightforward. If you are the owner, you will have the Edit Layout option at the top-right corner while you view the dashboard.

Jira comes with five layouts that you can choose from. These layouts differ in how the dashboard page's on-screen real estate is divided. By default, a new dashboard has the second layout that divides it into two columns of equal size:

1. Bring up the drop-down menu from Dashboards.
2. Select the dashboard you wish to edit the layout for.
3. Click on the Edit Layout option at the top-right corner. This will bring up the Edit Layout dialog.

4. Select the layout to which you wish to change, as follows:

A layout selected from the dialog box will be immediately applied to the dashboard. Any existing contents will automatically have their size and positions adjusted to fit the new layout. After you have decided on your dashboard's layout, you can start adding contents, known as gadgets, onto your dashboard.