There are at least two methods. For regular materials, both work. For glazed domes based on curtain walls, only the second does.
1) New family > generic model > from a front view > Create > Solid > Revolve > draw the section > select an axis > Finish > Load into project > Roof by face > select faces > Finish roof.
2) For glazed domes: New conceptual mass > Draw the section (open) and draw a line for the axis. Select the section and the axis line > Create form. Load into project > Curtain system > select faces > Create system. This method lets you have more control of the shape, even though you could also insert a primitive dome family.