Remote support service with two-way smart whiteboard

A method of remote support executed during a support session established between a first computing entity and one or more second computing entities that are coupled to the first computing entity, the method carried out at one of the second computing entities as an image feed generated at the first computing entity is being shared with the one or more second computing entities, comprising:

• generating and broadcasting sets of movement computations from the given second computing entity to the first computing entity and any other second computing entity, wherein the sets of movement computations represent transformation data to be applied to maintain position and orientation of an annotation relative to the image feed;
• receiving one or more sets of movement computations output from the first computing entity and any other second computing entity;
• determining, based on the sets of movement computations broadcast and received, whether the given second entity should continue to generate and broadcast sets of movement computations;
• and
• when it is determined that the given second entity should continue to generate and broadcast sets of movement computations, having the second computing entity assume and maintain responsibility for generating one or more additional sets of movement computations.