What Is This? Windows Basics
10. Windows
10.2. Resizing and Closing Windows
To resize a window, hold your mouse over one side or the top corner of the window until arrows appear. Drag one of the borders to expand or contract the window on that side. Drag a corner to change two sides at once. The resize arrows appear when your mouse is in the correct position to begin the drag action.
To close a window, click on the "X" at the top right of the window. This may close the application as well. In most programs, Windows will check to see if you have any active documents unsaved and ask you if want to save them before closing an application (so that you don't lose any of your work).
Note: if you just need to see the text on any screen a bit more clearly, try typing Control + on your keyboard to magnify the text of the window in which you are currently working. Control - will reduce the magnification. You can try this at any time.