ggplot 2 - editing in the "panel_1_1" viewport
I want to divide up the text grobs for the key labels into two different (text) grobs (each) and put them back into the space occupied by the original text grob. I've worked with grobs enough to think this should be easy, but I just cannot figure out how to identify the specific text grobs to replace on an arbitrary graph from the output of grid.ls(viewports = TRUE).
Hmmm, it looks like it isn't possible at the moment. I'll add a note to my to do to give the strip grobs better names so that you can pull out individuals more easily. Hadley