This page explains step-by-step how to turn on and use the on-screen keyboard in Mac OS X. An on-screen keyboard may be the best way to input information if you have a physical condition that makes using a keyboard difficult but you are able to use a mouse or other pointing device.
An on-screen keyboard looks just like a picture of a keyboard on the screen. Letters can be selected from the keyboard using a mouse, a single switch or a joystick.
Step 1: Set up the on-screen keyboard
Make sure you are in "Finder." If necessary, press Apple+Tab to cycle through the open applications until you return to "Finder."
Click on the "Apple" icon on the menu bar or press Ctrl+F2.
Click on "System Preferences," as shown in fig. 1, or press the down arrow key to highlight it and then press Enter.
Click on the "Keyboard" icon, as shown in fig. 2.
In the "Keyboard" window (fig. 3), tick the box next to "Show input menu in menu bar" by clicking on it.
Click on the "Keyboard" window's red close button or press Apple+W.
Step 2: Turn on the on-screen Keyboard Viewer
To view the keyboard, click on the icon in the upper right corner of the menu bar. Select "Show Keyboard Viewer" from the drop-down menu as shown in fig. 4. (There is no keyboard shortcut for this).
The on-screen keyboard (shown in fig. 5) will appear and float over all applications.
To make the keyboard larger, click on the green "+" symbol on the keyboard.