[MlMt] Resetting the View

[mailmate at businessdatasystems.co.nz]

I read my mail in three pane view: a thin left hand column contains mailboxes. The rest of the window is split by a horizontal divider, with message lists at the top and the message pane at the bottom.

Recently I've moved the divider between the message lists and the message pane. The mailbox column and the message list are visible but the message pane is not. I can see the divider at the bottom of the window. It displays the characteristic dimple and when I hover my mouse over it, the icon changes to a horizontal bar with an arrow pointing up. Clicking and dragging does nothing. I'm not able to move the divider to reveal the message pane.

This is frustrating me. How do I reset the window to sensible defaults?

Malcolm