Resize the "old" window in the same manner.
Here are some tips for repositioning and resizing browser windows:
In the upper right hand corner of each window are three symbols. The "-" or minimize symbol will shrink the window and place it on the taskbar at the bottom of the screen. The "X" or close symbol closes the window and with it the application.
The middle icon allows the window to be maximized to cover the entire screen or restored to the user set size. If the window is maximized and you place the pointer over the icon, the word "Restore" will appear, as shown in the image on the right below.
Clicking on the middle icon when the window is maximized will allow the window to be resized. (or restored to the user set size.)
To resize the window either vertically or horizontally, place the pointer over a window border. When the pointer becomes an arrow you can left click and drag the window border to the location you desire. The image below illustrates the arrow you will see when you place the pointer over the window border.
Remember, the window must NOT be maximized when you attempt to resize it. Also, after the window has been resized once, it will return to that size. This will be handy when you move from a practice session to a lesson and back again.
To move a window, place the pointer over the window title bar and left click and drag the window to the desired location.

To maximize the window when you return to non-practice lessons, click on the middle icon. The word "Maximize" will appear when the pointer is placed over the icon when the window size has been set by the user, as seen in the image below.

To return to the tutorial, follow the link below.