I ve discovered there are some formatting options on the GNU Plot graph after it has been generated through octave. If you press m it s then possible to right click and get a menu with choices to format the plot (line styles/colour/background/print). However, for me it crashes a lot and changing the values doesn t seem to have much effect.
There is some other functionality by using these key presses..
- m - allow menu on right-click
- a - zoom to full window
- p - previous zoom level
- r - overlay ruler
- g - overlay grid
- b - toggle border
- 1 - toggle output reading format
- 5 - display radius measure tool (when ruler is displayed)
- 7 - format aspect ratio (useful to get square plots to not distort scale)
These are just the ones I ve found by randomly testing the keyboard (!), so this is hardly exhaustive. But hope that helps.