When we open the files that don't know, we often use notepad to open, mainly because it is a plain text format, even if the virus file is opened, it will not cause any damage to the system. Then how do you use a notebook program to open it? Yes, "Open mode ..." in the right-click menu, don't answer me, because it is too much trouble, see what I am doing? Open the C: / Windows / Sendto folder, then copy the shortcut to the Notepad program to it. In this way, when you open the corresponding file with a notepad, you can click the right click, select "Send to", select "Notepad"! (In this method, the notepad can be used to switch other programs.