smartboard 6000 manual.The " Custom " button in the toolbar allows you to customize other functions to suit your needs. As follows: " Custom " key function is the default on-screen keyboard, without having to walk back and forth between the computer and interactive whiteboard. Press this button to call up the " On-Screen Keyboard " , select the area where you want to enter text, and type the text. To exit you can close it directly or press it again. If you press this button twice, a dialog box will pop up. Click " Start Program " in the dialog box , in the pop-up window, you can select the file or program you need to use frequently. After setting, press the " Custom " button every time you need to open the file or program. You can open the file or program you have set. If you want to revert to the initial on-screen keyboard function, press this button twice in succession, select ?? Restore Settings ?? in the pop-up dialog box, and then you can restore the ?? Custom ?? button to the on-screen keyboard function.