| -nox | - do not use X graphics (ignore graphics calls, but run program correctly)
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| -nox_warning | - when X windows support is not installed this prevents the warning message from being printed
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| -draw_pause <pause amount> | - - -1 indicates wait for mouse input, -2 indicates pause when window is to be destroyed
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| -draw_marker_type | - <x,point>
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| -draw_save [optional filename] | - (X windows only) saves each image before it is cleared to a file
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| -draw_save_final_image [optional filename] | - (X windows only) saves the final image displayed in a window
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| -draw_save_movie | - converts image files to a movie at the end of the run. See PetscDrawSetSave()
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| -draw_save_single_file | - saves each new image in the same file, normally each new image is saved in a new file with 'filename/filename_%d.ext'
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| -draw_save_on_clear | - saves an image on each clear, mainly for debugging
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| -draw_save_on_flush | - saves an image on each flush, mainly for debugging
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