How to move home page display an inch higher; 4 rows had previously been in middle of the screen.

My home page moved down from its previous position in the middle of the screen. I have to scroll down to bring it up. I have gone through all settings [including Zoom; remove "Use recommended performance settings" and " Use hardware acceleration when available" and nothing changes it back. No other application on my computer is misaligned. I have no idea why it moved or how to get it back to normal.