1. An apparatus for capturing images of a document and interaction of a primary user with the document in an interaction session, the apparatus comprising: image capture means adapted to capture an initial image of the document at an initial position and at least one subsequent, additional image of the document during an interaction session, wherein the document in the additional image has been moved to a new position that is different than the initial position, the initial captured image being mapped to a known co-ordinate system; interaction capture means for capturing the interaction of a user with the document, whereby the interaction capture means determines at least one co-ordinate of a pointer used for the interaction relative to the same co-ordinate system defined for the initial captured image; processing means for determining an appropriate transform that maps the additional image onto the initial image; and transmitting means for transmitting to a remote site the initial image and said at least one coordinate of the pointer, wherein the initial image having a pointer at said at least one coordinate of the pointer is displayable at the remote site, wherein the processing means is additionally adapted to apply the transform to the at least one captured co-ordinate of the pointer to produced at least one mapped pointer co-ordinate which is transmitted to the remote site.