Cylinder

Radius	Defines the radius of the cylinder.
Height	Defines the radius of the cylinder.
Rotation Segments	Defines the number of subdivisions of the object along its circumference.
Height Segments	Changes the number of subdivisions of the object in the lengthwise direction.
Cap Segments	Defines the number of subdivisions of the caps in a radial direction.
Top Filler R	Radius of top fillet.
Top Filler Segments	Defines how fine the top fillet appears. The more segments you specify, the smoother the fillet. To create a chamfer instead of a rounded fillet, set Fillet Segment to 1.
Bottom Filler R	Radius of bottom fillet.
Bottom Filler Segments	Defines how fine the bottom fillet appears. The more segments you specify, the smoother the fillet. To create a chamfer instead of a rounded fillet, set Fillet Segment to 1.
Slice Start	Defines a start angle.
Slice End	Defines an end angle.
Cap Start Slice	When checked, start slice will be closed. If not checked, slice will be open and you may see internals of cylinder.
Cap End Slice	When checked, end slice will be closed. If not checked, slice will be open and you may see internals of cylinder.
Main Axis	Gives an ability to select the object’s initial orientation in space, without using transformation matrix. .
Enabled	When enabled, cylinder will be created. If not checked, this will be empty node.

Cylinder is very similar to Cone, but has some 'restrictions': top and bottom radius are same and number of top/bottom segments are equal as well.