The skewed charts have a large white border; how do I make it transparent?
When the charts are rotated, they are essentially placed in a larger raster that is north up and can contain the rotated image. This often leaves a large white area that may mask out some other theme below it. To turn this extra border transparent, edit the colormap of the image. Edit by double clicking on the theme legend to get the Image Legend Editor, and select the colormap button to show the colormap. The extra border is always color number zero. Double click on its color to get the color editor and select the transparent color (the one with the “x” in it).
