Markup comments can also be added to any page of multi-page PDFs and TIFs. When the markup window opens, the first page of the file is shown in the main part of the window. The remaining pages of the file can be accessed from the left side of the window. Initially, there will be an image placeholder for each page. Click on the desired page to open it in the main window and add markup comments to this page. Once a page has been opened, a small thumbnail of that page will be shown on the right pages menu. To view only pages in the document that have markup comments, click the Show only pages with markup checkbox at the top left.