Inkscape is an Open Source vector
graphics editor, with capabilities similar to Illustrator, CorelDraw,
or Xara X, using the W3C standard Scalable Vector Graphics (SVG) file
The new outline editing in OPAL 2.3 is designed to work in a similar way
to the curve editing provided by Inkscape - so once you are comfortable
with curve editing in either program, you will probably find it easy
to edit curves in the other.
We include a copy of the latest version of Inkscape (0.47) on the OPAL
installation CD for your convenience.
OPAL 2.3 can save x-ray tracings as SVG files that can be edited using
Inkscape. In Inkscape you can modify line thicknesses, change fonts,
remove unwanted parts of the tracing, add captions, combine with other
images - the list is endless. Inkscape can then export modified tracings
as bitmap images which can be imported into Powerpoint, etc.