All Symbolic, as it's name indicates is the one where Uncut, Cut and Overhead components are all displayed with their symbolic view.
All Projected is also self explanatory. In case we have Projected Uncut, Cut and Overhead components, the display will be the projected view of the 3D geometry.
This is a Curtain Wall specific display mode. It let's us choose different combinations for the components, where we can have symbolic and projected components at the same time, therefore creating a "hybrid" view. Every other combination that is not set to all projected or all symbolic, will have this name.