After opening a new file you should immediately think of a filename and a location on your computer where you store it to save the file. The location could be for example the desktop. This is the procedure: Click on menu File ⇒ Save As ⇒ and it will open the window "Save As". Now you must: choose where to save your new file (in the example below it is saved on the desktop). Then: type in the desired name. Then press "Save". Now your file is saved on the desktop, from where you always can open it.