To Change the Assignments from the Default to Your Preferred Configuration

You must first assign the buttons in the Wintab dialog and then in MicroStation.
Start the Bentley Tablet Driver.
Select Configure Mouse Emulator.
Select Configure Buttons.
Click Button #1 in the Physical Button list box.
Click Application defined function in the Action list box.
Click Button #3 in the Physical Button list box.
Click Application defined function in the Action list box.
A Bentley "B" precedes each line in the Physical Button list box.
Click Button #2 in the Physical Button list box.
Click Left-click in the Action list box.
Click Button #5 in the Physical Button list box.
Click Right-click in the Action list box .
There should not be a Bentley "B" on the lines for buttons number 2 and 5.
Click OK in the Wintab Button Configure dialog.
Turn on Save as default in the Configure Tablet Context dialog.
Click OK in the Configure Tablet Context dialog.
Click OK on Bentley Tablet Driver dialog.
Start the Bentley Tablet Driver.
Click Close on Bentley Tablet Driver dialog.
You have successfully changed the Right-click and Left-click events from buttons 1 and 3 to 2 and 5.
Start MicroStation.
Select File > Settings > User > Button Assignments .
The Button Assignments dialog opens.
Click Default.
Select Tentative from the list box.
Press button #8 on the puck when the cursor is in the Button Definition Area .
Select Command.
Press button #11 on the puck when the cursor is in the Button Definition Area.
Due to the large variety of tablets, pucks, and drivers combinations MicroStation does not attempt to display the actual button number. MicroStation will display a synthesized button number in the Invoked by column.
Repeat steps 23 and 24 for each button and function pair that you wish to set and click OK when you are finished.