Bind to Armature

• Have your mesh and the Avastar figure and rig ready.
• Select both your mesh and the rig (use SHIFT RMB to add an object to your selection).
• In the Avastar Tab:
  go to the Skinning panel
  set the Weight option to Keep
  ensure that Alter to Rest Pose is disabled.

Now you are ready to press the Bind to Armature button. At this point both your mesh and rig are still selected and can stay selected for the next steps in the workflow.

Note: If you are doing Classic Rigging, the binding part is now finished.