When a toolbar is presented as text (words) rather than icons (pictures), the number of elements visible is severely constrained. This is because each text element is generally much wider than the icon equivalent. To make such a toolbar more practical and useful, text should be presented on two rows rather than just one. Each text element should use a font approximately half as high as the icons so that both rows of elements can fit into the same vertical space as the single row of icons.

This is a technique I first saw on very old versions of WordPerfect. I've wondered since why it hasn't been adopted more widely.