Where is Custom View in the new Font Book?

In previous versions of Font Book, you could set a custom view, so you could test a particular string of characters, rather than the default alphabet and numbers. When you clicked the font in the sidebar, and selected Custom from the menu (Command-3), your custom text would fill the main window.

I've figured out that you can replace the default text that's shown in the preview, but I need to see the following characters for each font:

ABCDEFGHIJKLMNOPQRSTUVWXYZ

abcdefghijklmnopqrstuvwxyz

1234567890

. , " ( ) / -?!$& 

fi ff ti

When I paste that into the preview, it only shows me the first line, even at the smallest view:

How can I see the block of text I've pasted into the field?