Select the blank page in the column on the left side of the toolbar. How do I add or delete a page from a PDF on Mac and iOS (including iPhone, iPad, and iPod Touch)? On your Mac, select the PDF you'd like to work with, then go to the menu bar > File > Options > View > PDF Viewer. On your iOS device, use any of the PDF readers listed below. On your Mac, open the PDF you'd like to edit, then from the menu bar of iOS, choose View > PDF viewer. On your iPhone or iPad, launch Preview for Mac from the Apple menu, and then choose the PDF you'd like to edit from Open PDF...” (or Open...” in the bottom left if using the app.) How do I change the page size of a PDF in Photo Booth? You can change the size of a PDF through a PDF in Photo Booth. Go to the photo booth (right-click on the thumbnail of the photo) > Edit > Page size. If you are using a PDF in Photo Booth, you can also select it and then choose Edit > Page size. How do I change the font used in My Documents to help me read the page? If you choose to set a font, it must be the same type that will be used on the PDF page. You can change the font used in My Documents to make it clear that you read the page even as you zoom out or in. To open the PDF page in the browser, drag it from the menu bar to the desired location. You can also select the PDF page and then choose Edit > Page Size. If you do not see the page in the menu bar, you can press the Option key as you hover over its icon. How do I display a message in the upper right corner of the PDF that appears after a page is selected? The PDF page will be displayed with a message in the upper right corner of the PDF, but you must make this message visible before your page is saved. To do so, select the page and click Edit > Messages > Add to PDF. Once the message appears, you must press Option key on your keyboard to accept. If you do not see the message on your PDF you can press and hold the Option key while clicking Edit > Messages to make it visible.