You can only move joints in the Frame window.  Before moving a joint, be sure that there are no joints selected in the frame.

To move a joint

§    Point to the joint, press the mouse button and hold it down

§    Drag to the new position of the joint

§    Release the mouse button to fix the new location

Holding down the shift key while dragging will constrain movement vertically, horizontally or to 45 degrees.  The coordinates of the joint will be displayed in the bottom left hand corner of the window as you drag.  If you have turned on the Grid option, the joint will align with the grid as you move it.

If you drag a joint on top of an existing joint, Multiframe will create a connection between the members that meet at the common point.

You can only drag joints in two-dimensional views.  When you drag a joint, Multiframe will not change the depth of the joint.