diff --git a/docs/parameter.md b/docs/parameter.md
index b1ef29c..d95ef65 100644
--- a/docs/parameter.md
+++ b/docs/parameter.md
@@ -54,6 +54,7 @@ This dict contains physical data needed to calculate the various dependencies (s
   - `height`: [float] Height of the building, in m. Default value is 3.35.
   - `width`: [float] Width of the building, in m. Default value is 3.05.
   - `window1`: [str] Position of window 1 (bottom), in cartesian coordinates, in meters. Default value is '.38 .22 2.29 .85'. These values represent respectively: starting X, starting Y, width, and height. More specifically, the origin of x=0; y=0 is the ground level and the south facade is always at -y, north at +y, west at -x, and east at +x.
+![Window coordinates.jpg](docs/Window coordinates.jpg)
   - `window2`: [str] Position and size of window 2 (middle), in cartesian coordinates, in meters. Default value is  '.38 1.07 2.29 .85'. These values represent respectively: starting X, starting Y, width, and height. More specifically, the origin of x=0; y=0 is the ground level and the south facade is always at -y, north at +y, west at -x, and east at +x.
   - `window3`: [str] Position and size of window 3 (top),in cartesian coordinates, in meters. Default value is '.38 1.98 2.29 .51'. These values represent respectively: starting X, starting Y, width, and height. More specifically, the origin of x=0; y=0 is the ground level and the south facade is always at -y, north at +y, west at -x, and east at +x.
 - `elevation`: [float] Elevation of the building from sea level, in m. Default value is 100.