To Select Multiple Faces on a Solid

Select the Modify Solid Entity tool, with the Face icon selected.
Turn on Full Dynamics.
Enter a data point to select a face on the solid.
The nearest face is highlighted.
Enter a data point to select the face.
The push-pull effects are dynamically displayed.
Hold the <Ctrl> key.
Push-pull dynamics stops.
Continue holding the <Ctrl> key, and select another face on the solid.
Repeat to select another face.
Release the <Ctrl> key, and Reset.
Another face is selected replacing the last one selected previously.

Left: Faces selected via data point clicks.Right: Right click deselects front face, and selects bottom face.
Reset again.
The last selected face is deselected.
Reset once more. Then repeat.
The next to last face is deselected. Repeating the Resets deselects faces until none are left selected.

Left: Effect of second Reset.Middle: Effect of third Reset.Right: All faces are deselected with another Reset.
Resume selecting faces using earlier steps.