Paul Murrell <paul at stat.auckland.ac.nz> [Wed, Jul 15, 2015 at 11:12:33PM CEST]: ...>downViewport("plot_01.panel.1.1.vp")... This works like a charm. Thank you! Upon reading more of the documentation, I found that current.vpTree() shows all names of active viewports. -- Johannes H?sing There is something fascinating about science. One gets such wholesale returns of conjecture mailto:johannes at huesing.name from such a trifling investment of fact. http://derwisch.wikidot.com (Mark Twain, "Life on the Mississippi")