diff --git a/lib/ice-coder.js b/lib/ice-coder.js
index c930830..0fd29b7 100644
--- a/lib/ice-coder.js
+++ b/lib/ice-coder.js
@@ -1538,24 +1538,28 @@ var ICEcoder = {
 		var cM, mmPosY;
 
 		if (ICEcoder.mouseDownMinimap) {
-			// console.log(Date.now() - ICEcoder.lastScrollTS);
 			cM = this.getcMInstance();
+			// Set mid height position
 			mmPosY = e.y - get('miniMapContainer').getBoundingClientRect().top - (get('miniMapBox').getBoundingClientRect().height / 2);
+			// Unless it would be beyond bottom, if so, set to bottom
 			if (mmPosY > get('miniMapContainer').getBoundingClientRect().height - get('miniMapBox').getBoundingClientRect().height) {
-				// console.log("YES");
 				mmPosY = get('miniMapContainer').getBoundingClientRect().height - get('miniMapBox').getBoundingClientRect().height;
 			}
+			// Unless it would be beyond top, if so, set to top
 			if (mmPosY < 0) {
 				mmPosY = 0;
 			}
 			get("miniMapBox").style.top = mmPosY + "px";
-			maxHeight = parseInt(get('docExplorer').style.height, 10) <= parseInt(get('miniMapContainer').getBoundingClientRect().height, 10)
+			// Set the max height to be that of doc explorer, or if less, the content height
+			maxHeight = parseInt(get('docExplorer').style.height, 10) <= parseInt(get('miniMapContent').getBoundingClientRect().height, 10)
 				? parseInt(get('docExplorer').style.height, 10)
-				: parseInt(get('miniMapContainer').getBoundingClientRect().height, 10);
+				: parseInt(get('miniMapContent').getBoundingClientRect().height, 10);
+			// Work out the new percentag, from that yPos and set CM scroll position to that
 			newPerc = (mmPosY / (maxHeight - ICEcoder.miniMapBoxHeight));
 			yPos = (cM.getScrollInfo().height - cM.getScrollInfo().clientHeight) * newPerc;
 			cM.scrollTo(0, yPos); // this.position.y
 		}
+		// If mouse buttons up, we no longer have mouse down on minimap
 		if (e.buttons === 0) {
 			ICEcoder.mouseDownMinimap = false;
 		}