Hi Rich,
first of all, thanks a lot for the great work on SexyTopo! I like your app a lot.
Unfortunately, there is no documentation, but the attributes are the following:
xth_me_area_adjust <Xmin> <Ymin> <Xmax> <Ymax> - where Xmin, Ymin and Xmax, Ymax are cartesian coordinates of lower left and upper right corners of drawing area
xth_me_area_zoom_to <zoom> - where <zoom> is the default zoom factor, when drawing is open in xtherion. Should be 25,50,100,200,400.
xth_me_image_insert {<Xpos> <visibility> <gamma>} {<Ypos> <root>} {<filename>} 0 {}
<Xpos> <Ypos> is the position of the 0,0 point of XVI coordinate system
<visibility> - 0 image is hidden / 1 image is shown
<gamma> - image gamma
<root> - root station name (if XVI is changed during compilation, this station keeps its position relative to the entire drawing). Can be omitted.
<filename> - name of image file
0 {} - image identifiers, can be 0 {} for all images - if it is like this, it will be calculated automatically
HTH, S.