I don't think I knew about show() either, so I have a couple of things to try. Many thanks! Tom -- View this message in context: http://osgeo-org.1560.x6.nabble.com/setting-QgsMapCanvas-size-for-testing-map-tools-tp5273987p5274573.html Sent from the Quantum GIS - Developer mailing list archive at Nabble.com.