# beginPage(mediaBox:) Starts a new page in a page-based graphics context. ``` func beginPage(mediaBox: UnsafePointer?) ``` ## Parameters `mediaBox` A rectangle defining the bounds of the new page, expressed in units of the default user space, or `NULL`. These bounds supersede any supplied for the media box when you created the context. If you pass `NULL`, Core Graphics uses the rectangle you supplied for the media box when the graphics context was created. ## Discussion When using a graphics context that supports multiple pages, you should call this function together with [`endPage()`](/documentation/CoreGraphics/CGContext/endPage()) to delineate the page boundaries in the output. In other words, each page should be bracketed by calls to `CGContextBeginPage` and `CGContextEndPage`. Core Graphics ignores all drawing operations performed outside a page boundary in a page-based context. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)