Brlcad/How to mged/variable

The mged utility utilizes a set of inbuilt variables:


 * /autosize/
 * /context/
 * /coords/
 * /difference_op/
 * /dlist/
 * /eye_sep_dist/
 * /faceplate/
 * /fb/
 * /fb_all/
 * /fb_overlay/
 * /hot_key/
 * /intersection_op/
 * /linewidth/
 * /linestyle/
 * /listen/
 * /mouse_behavior/
 * /nmg_eu_dist/
 * /orig_gui/
 * /port/
 * /predictor/
 * /predictor_advance/
 * /predictor_length/
 * /perspective/
 * /perspective_mode/
 * /rateknobs/
 * /rotate_about/
 * /sliders/
 * /toggle_perspective/
 * /transform/
 * /union_op/
 * /use_air/