You can edit a Report or Dashboard to change its layout from the Page Setup.
You may need to change the layout of a report or Dashboard for many reasons:
If you want to add a report to the Performance area, you first need to convert it as a Dashboard
If you want to share a Dashboard, you need to convert it as a report first
If you need to change the orientation between a Portrait or Landscape layout
How to convert into a Portrait or Landscape Report
How to convert into a Portrait or Landscape Report
Click the Reporting tab
Click the Dashboard or Report from the report's list, then Edit
Click Page Set Up
Select either Portrait or Landscape and Save.
How to convert a report into a Dashboard
How to convert a report into a Dashboard
Click the Reporting tab
Click the report from the list, then Edit
Click Page Set Up
Select Dashboard and Save.
📌TIP: When you convert a report or dashboard, it will override the existing report. If you want to keep both, you can duplicate the report before you convert it.