Hi John,
On my B2 remote, I just cycle through the lower case on the appropriate key until the upper case characters are displayed; for example the '2' button has the 'abc' characters also.
The display cycle for this button is 'a - b - c - 2 -A - B - C', so just keep pressing the button until the upper case characters show.
Is that what you are looking for, or have I mis-understood the query?
Regards,
Peter.