A first communication endpoint determines that a co-browsing session has been established. The first communication endpoint sends contents of a displayed web page in a first browser to a second browser, which has a different display size and/or layout. The first communication endpoint detects a movement of a first cursor in the displayed web page and identifies a first user interface element that the first cursor is currently over. The first communication endpoint determines a ratio of coordinates of the first cursor in relation to a size of the first user interface element. The first communication endpoint sends an identifier for the first user interface element and the determined ratio of coordinates to the second browser. The second browser uses the determined ratio of coordinates to calculate a position of a second cursor over the first user interface element displayed in the second browser.