In Google Docs, you can change the page orientation for one page or a specific section of your document by following these steps:
Open your Google Docs document in which you want to change the page orientation.
Place your cursor at the beginning of the page where you want to change the orientation. If you want to change the orientation for an entire page, you can simply click at the beginning of that page.
Go to the "File" menu at the top-left corner of the Google Docs window.
Select "Page setup" from the dropdown menu. A Page Setup dialog box will appear.
In the Page Setup dialog box, you'll see the "Orientation" section. Here, you can choose either "Portrait" (vertical) or "Landscape" (horizontal) orientation for the selected page or section.
Make sure the "Apply to" dropdown menu is set to "Selected text" or "This section" depending on your preference. If you want to change the orientation for only one page, choose "Selected text." If you want to apply it to a section, choose "This section."
After making your selection, click the "OK" button to apply the new page orientation to the selected page or section.