There is a quick way to make edits: 1. Select an item or type and then select Edit, 2. Then click Insert Page, 3. Next, type the text you want and check the edit box to save the PDF. How to Save PDF on a Mac: How to View PDF files on Mac? To view a PDF file in Preview window, make a copy and click the Open button. When you have finished working on a file, click Close in order to save the PDF file. To open PDF file on Mac: 1. Select Preview in the menu bar 2. Click File > Open 3.