1. A computer-implemented method of executing a virtual conference among a plurality of nodes including a first node, wherein there is a display device associated with the first node that is configured to display a virtual conference window containing images of participants at other nodes of the plurality of nodes, the method comprising: displaying the virtual conference window in a state of mono-presence in response to receiving a selection in the virtual conference window, wherein the displaying of the virtual conference window in a state of mono-presence triggers a process of identifying one of the nodes as an attention recipient and displaying the attention recipient's image differently than images of other nodes; and deactivating the virtual conference window in response to receiving a selection in another window, wherein the deactivating of the virtual conference window stops the process of identifying an attention recipient.