Fig 1. Sculpt Menu

Fig 1 shows you what you get when you use the <4> or <5> keys:

<4> - Push

Press and hold the <4> key to push in the surface at the mouse pointer location.

<5> - Pull

Press and hold the <5> key to pull out the surface at the mouse pointer location.

<G> - Sculpt Marked

<Shift-G> - Sculpt Marked Inwards

Fig 2. Settings

Additional Settings

If you click on the gray Sculpt button in the Brushes panel, then some additional settings are shown (see Fig 2). Click on the Sculpt button again to hide these away.

Shape 

Dir