You can't - all 24 hours will be available with your specified hours shaded.

Signature
Milly Staples [MVP - Outlook]
Post all replies to the group to keep the discussion intact. All
unsolicited mail sent to my personal account will be deleted without
reading.
After furious head scratching, mkr_trash asked:
| I have set the following:
| Tools
[quoted text clipped - 4 lines]
| But the daily calenday still displays Midnight at the top and I have
| to scroll down to see each day. How can I display only specific hours?