New Model From Template
Add To Model from Template
Click the File menu > New Model command to access the New Model form.
Click the drop-down list to set the units to 
..
Click on the Shells button 
to access the Shells form. In that form:
Select Cylinder in the Shell Type drop-down list.
Type 20 in the Cylinder Height edit box.
Type 10 in the Radius edit box.
Type 8 in the Number of Divisions, Z edit box.
Accept the default Num of Divisions, Angular, 16.
Click the OK button.
Click in the “X” in the upper right-hand corner of the X-Y Plane @ Z=0 window to close it.
Click the Set Display Options button 
(or the View menu > Set Display Options command) to access the Display Options for Active Window form. In that form:
Check the Fill Objects box.
Click the OK button.
Click the Edit menu > Add To Model From Template command to access the New Model form. In that form click on the Shells button to access the Shells form. In that form:
Select Spherical Dome in the Shell Type drop-down list.
Accept the default Num Divisions, Angular, 16.
Type 4 in the Number of Divisions, Z edit box.
Type 10 in the Radius, R edit box.
Accept the default Roll Down Angle,T, 90.
Uncheck the Restraints check box if it is not already unchecked.
Click the Locate Origin button to access the Coord System Location and Orientation form.
Note: The Coord System Location and Orientation form is being used to define a location of the origin of a new coordinate system and its rotation with respect to the global coordinate system. The origin point of the template will be inserted at the origin of this newly defined coordinate system.
In the Coord System Location and Orientation form:
Select the 3D option.
In the Translations area, type 20 in the Z edit box.
Click the OK buttons on the Coordinate System and Shell forms to exit all forms.
Press the F7 key on the keyboard to toggle the grid lines off.