Better document scrollDisp

diff --git a/src/xterm.js b/src/xterm.js
index 6fab9d2cd054e9543c916fea823d2c2b41bbe28e..7211dde7d8c21e5dc4e19e8e125a3a021b3ee9f2 100644 (file)
--- a/src/xterm.js
+++ b/src/xterm.js
@@ -1456,7 +1456,7 @@
 
        /**
         * Scroll the display of the terminal
-        * @param {number} disp
+        * @param {number} disp The number of lines to scroll down (negatives scroll up).
         */
     Terminal.prototype.scrollDisp = function(disp) {
       this.ydisp += disp;