Why do I sometimes need to scroll with the sidebars visible? Is it normal? This happens when you are using something like PDF Viewer or Safari (for example), where you want to scroll with the sidebar view. In the sidebar you will see the text that you want to scroll through. The problem occurs when you do Scroll the sidebar view with the keyboard down, and suddenly notice you cannot see the text you want to scroll. Sometimes this is due to a font, and sometimes it is due to scroll in the sidebar view. A video about this issue can be found here There is a workaround: Select one of the sidebars in the sidebar on the display you are using, or select View > Scroll Bars. Select the same one in Safari, and scroll the text with the keyboard up. Then, select View > Scroll Bars, scroll the text with the keyboard down, then select View > Scroll Bars again, scroll the text with the keyboard up. This will bring the scroll bars out of the sidebar view. So, scroll, scroll... The same issue as above can also happen when scrolling through files in Preview and the sidebar is hidden due to keyboard limitations. I'm getting the same problem To fix this issue it's necessary to have a sidebar visible, otherwise the text would be invisible in the sidebar view. Also, sometimes it's necessary to add the view in the view menu, because you may need it when creating a document, or adding a file into a document.