+<br><br>Image size:
+<br><label for="image_width">Width:</label>
+<input id="image_width" value="300" maxlength="4" size="4" type="number"
+ onchange="checkISValue(this, 'dim'); recalcCoord('Ci', 'scale');">
+<label for="image_height">Height:</label>
+<input id="image_height" value="300" maxlength="4" size="4" type="number"
+ onchange="checkISValue(this, 'dim'); recalcCoord('Cr', 'scale');">
+<input type="checkbox" id="proportional" checked="true"
+ onchange="checkProportions();">
+<label for="proportional">proportional</label>
+
+<br><br><label for="iterMax">Maximum of iterations:</label>