Ribbon groups allow you to consolidate related controls within a tab. The wonderful thing about Ribbon groups is that the controls in a group
and the group itself can change their visual representation when the Ribbon width changes (see Figure 1).
Figure 1 Ribbon group layout depending on the ribbon width
When a Ribbon group is collapsed, the user can still access its controls through a pop-up window (see Figure 2), which
can be invoked by left clicking the collapsed group.
Figure 2 Controls in a collapsed Ribbon group