Candidate tree structures, each of which includes a current tree structure and a respective node defining a respective relative location on the selected page for another graphic object selected from a set, are generated. Initial size dimensions are determined for the graphic objects in each of the candidate tree structures. Respective scores are computed for the candidate tree structures based at least in part on the corresponding initial size dimensions. One of the candidate tree structures is selected as the current tree structure based on the computed scores. The process is repeated until relative locations on the page are defined for all of the graphic objects in the set. Next, final size dimensions are calculated for the graphic objects in accordance with the current tree structure. Respective positions of the graphic objects on the selected page are specified in accordance with the current tree structure.