Faults tab

The Overlay Layers' Faults tab

Distance Between Symbols (Map Units) - This option sets the distance between fault symbols for all faults in the selected layer.

Symbol Size - This option sets the size for fault symbols for all faults in the selected layer.

Solid Fill Normal Fault Symbols - This option adds a solid fill to normal fault symbols.  Deselecting this option keeps the normal fault symbols empty.

A solid fill normal fault symbol (left) and a non-solid fill normal fault symbol (right)

Fill Reverse Fault Symbols - This option adds a solid fill to normal reverse fault symbols.  Deselecting this option keeps the reverse fault symbols empty.

A solid fill reverse fault symbol (left) and a non-solid fill reverse fault symbol (right)

Fault Polygon Angle Tolerance -