1. A method to mark a region in a graphical presentation, the method comprising: identifying, with a processor, a plurality of user-selected points selected in the graphical presentation with an input device; determining, with the processor, that the plurality of user-selected points defines a boundary of the region; responsive to a first user input received prior to or during selection of the plurality of user-selected points with the input device, comparing, with the processor, a plurality of stored templates with the plurality of user-selected points to identify a first one of the stored templates to mark the region; and displaying, in the graphical presentation, the first one of the stored templates identified by the processor based on the comparing of the plurality of the stored templates with the plurality of user-selected points, prior to the first one of the stored templates being accepted for marking the region.