Microsoft Edge is the default PDF reader and viewer in Windows 10. To open a PDF file, simply double-click on the respective file and Edge will quickly take over. Of course, this doesn't mean you can't use third-party tools to view PDFs. You just need to right-click on your PDF and select the tool you want to use to open it. If I set the dpi zoom to 150% on a 1920x1080 resolution screen and load the pdf it zooms out to 67%. At first we thought it was the Adobe settings zooming out to page width, but I've set Adobe zoom to 10% and reloaded the pdf in IE Mode and that appears tiny at 10% but Edge still zooms out for some reason. Edit Answer (for another -38 minute) Found the answer in another part of the forum -> Preferences -> Page Display -> Page Content and Infomation -> check show large images. This resolved the problem. By gmarko. Edit Answer (for another -27 minute) Found Preferences>General>Show Welcome Screen. However, stil no "Combine Files" choice. PDF dark mode reading is a life-altering experience. the whole experience. If you reach that state, but still would like to reduce the negative effect of the bright white screen - Filtered mode is the way to go. In other words, you can set certain modes/filters to be applied only when you are opening PDFs in your browser. For example