When you have generated a dome, you will find that the reason the orientation of the members is not exactly what you expect is because of the convention that Multiframe uses for determining which is joint 1 and which is joint 2 on a member.
 
The orientation depends on this ordering since the orientation is defined relative to a vertical plane passing through the two joints and looking in the direction from joint 2 towards joint 1. Multiframe adopts the convention that joint 1 is always the joint to the left of the member in the front view and in the case of members which are vertical joint 1 is at the bottom, joint 2 at the top.
 
In the case of a member which lies in the xy plane, joint 1 will be the joint on the left and joint 2 will be the joint on the right. In the case of a member which lies in the xz plane, joint 1 will be the joint on the left as viewed in the right hand view and joint 2 will be the joint on the right as viewed in the right hand view.
 
For other members which are at arbitrary orientation, the joint numbering will stay the same as that when the joints were generated. It is important to consider the order of the joints in the member when viewing it's orientation. If you are viewing the table of members in the Data Window you will need to check the numbers of joint 1 and joint 2 in the left columns when reviewing the member orientation. The graphical displays in the windows should be correct if you take this into account.