The window zoom action is used to enlarge a section of the worksheet bounded by a rectangle. This action is performed by moving the cursor to the top-left corner of the area you wish to select. Then, press and hold the left mouse button. Moving the mouse draws the rectangle that delimits the area to be magnified. When the mouse is positioned on the bottom-right corner of the area to be magnified, release the left mouse button. The selected area of the worksheet will be moved to fill the available space in the window. The figures below illustrate this: