The full display, depending on what component you have preset, will always appear unless you delete some keys or program them to be blank because they are not needed.

See How to change, label or hide buttons, below.

Your question, and many others which may come up, will be answered somewhere in the following threads.

RM-AV3000/3100 NEWCOMERS PACKAGE-WELCOME-CHECK THESE OUT (IF YOU HAVEN'T ALREADY DONE SO) AND SAVE YOURSELF SOME PROBLEMS

SYSTEM CONTROL KEYS: Everything you need to know about them

HOW TO LABEL, CHANGE OR HIDE BUTTONS

CHANGING BATTERIES (May not be necessary on RM-AV3100, but why take a chance when it's only 20 seconds?)

AND IF YOU HAVE A SONY RECEIVER:
HOW TO CHANGE YOUR RECEIVER AND REMOTE TO AV1 (or AV2) COMMAND MODE

AND HERE IS SOME MORE INFO IN CASE THE MANUAL GETS TOO CONFUSING

REMOTE CENTRAL RM-AV3000/RM-AV3100 FORUM REVIEW (INCLUDING THE QUICK PROGRAMMING GUIDE)

Also, check out the TIPS AND TRICKS section.