diff --git a/src/utils/Mouse.ts b/src/utils/Mouse.ts
index b5faa167..ce852ace 100644
--- a/src/utils/Mouse.ts
+++ b/src/utils/Mouse.ts
@@ -4,6 +4,14 @@
 
 import { CharMeasure } from './CharMeasure';
 
+/**
+ * Gets coordinates within the terminal for a particular mouse event. The result
+ * is returned as an array in the form [x, y] instead of an object as it's a
+ * little faster and this function is used in some low level code.
+ * @param event The mouse event.
+ * @param rowContainer The terminal's row container.
+ * @param charMeasure The char measure object used to determine character sizes.
+ */
 export function getCoords(event: MouseEvent, rowContainer: HTMLElement, charMeasure: CharMeasure): [number, number] {
   // ignore browsers without pageX for now
   if (event.pageX == null) {
@@ -29,6 +37,16 @@ export function getCoords(event: MouseEvent, rowContainer: HTMLElement, charMeas
   return [x, y];
 }
 
+/**
+ * Gets coordinates within the terminal for a particular mouse event, wrapping
+ * them to the bounds of the terminal and adding 32 to both the x and y values
+ * as expected by xterm.
+ * @param event The mouse event.
+ * @param rowContainer The terminal's row container.
+ * @param charMeasure The char measure object used to determine character sizes.
+ * @param colCount The number of columns in the terminal.
+ * @param rowCount The number of rows in the terminal.
+ */
 export function getRawByteCoords(event: MouseEvent, rowContainer: HTMLElement, charMeasure: CharMeasure, colCount: number, rowCount: number): { x: number, y: number } {
   const coords = getCoords(event, rowContainer, charMeasure);
   let x = coords[0];