One way to preview files is by opening File Explorer, clicking View > Preview Pane, and selecting a file on the list. Another ...

In the General tab, select the circle next to “Single-Click to Open an Item.” Also, choose “Underline icon titles only when I ...

Windows 10 makes it easy to make the icons in a folder larger or smaller. First of all, note that changing the icon size of files in a folder changes the size of all the icons in that folder.