Across the width.
Portrait - width < height
Lanscape width > height
Typically achieved by rotating paper though a right angle!
When the paper orientation is set to portrait, the contents are arranged vertically, meaning they will print across the length of the page (the shorter side). This orientation is commonly used for documents like reports and letters, where the height is greater than the width. In contrast, landscape orientation prints across the width of the page, which is more suitable for wide tables, graphs, or images. Therefore, choosing portrait affects how the information is visually presented on the page.
across the width of the page
Portrait.
landscape (portrait prints across the short side)
Landscape orientation means the printout will be across the length of the page, while portrait orientation means it will be along the height of the page.
You can print on paper in two ways. They are Portrait and Landscape. Normally we print in Portrait orientation. That is when the page is longer top to bottom than across. It is the way most portrait paintings are, hence the name. Landscape is when the paper is orientated so that it is wider across than it is from top to bottom. That is the way most paintings of landscapes are, hence the name. We normally use portrait orientation for standard documents, like letters. Landscape can be used for things like printing signs.
Normally we print on pages in Portrait mode, but if you are printing the other way, it is called Landscape. They their names from the usual orientation of paintings of each type.
Landscape orientation when printing fits more columns than rows. This orientation is wider than it is tall, allowing for additional columns of data to be displayed side by side across the page. However, the height limitation means fewer rows can be accommodated compared to portrait orientation.
Assuming you're asking about page orientation... If the information is spread more sideways than vertical, you would set the page to landscape rather than portrait.
Across (horizontal)=Landscape. Vertical=Portrait
Across (horizontal)=Landscape. Vertical=Portrait
If the screen rotation of iPhone is locked, then it won't turn sideways.