Page 664 - Windows 10 May 2019 Update The Missing Manual: The Book That Should Have Been in the Box
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Second column: The list of messages.
Third column: The actual message body of whatever you’ve
selected in the list.
As you can see in Figure 10-2, though, these columns do various degrees of
collapsing or shrinking as the window gets narrower.
Figure 10-2. Top: When the window is wide enough, you see three full columns.
Middle: If the window isn’t quite wide enough for all three columns, the Accounts/Folders panel
collapses down to a vertical pillar. You can still see a list of accounts or folders by selecting the
appropriate icon—a panel flies out temporarily—but it’s an extra click.
Bottom: If the window is narrower still, the message list is hidden. The entire Mail app fits into a thin
strip of a window.

