Sometimes, you might need the page to be in the landscape orientation to include a large table, a graph, or a map. In Google Docs, you can create a new document with either the portrait or the landscape layout. You can even take an existing Google Doc and change the page orientation to landscape.
You must be a bit more careful with an existing document as the change in page orientation can affect the original layout of the text and media in your document. So, review it once before you save or share it.
How To Change The Page Orientation To Landscape In Google Docs On Mobile
The process to change a document from portrait to landscape (and vice-versa) is slightly different on Android and iOS. You can find the page setup controls in the three-dot menu on the mobile apps. The screenshots below refer to iOS.