diff --git a/index.html b/index.html
index 036de565..fc7e4b03 100644
--- a/index.html
+++ b/index.html
@@ -2986,6 +2986,7 @@
             SP = Support (Doesn't move if all aren't empty)
             DL = Delete
             CL = Clone
+            CF = Clone first touched
             CH = Change
             RP = Replace (Move to an existing element)
             CR:element_name = Create a pixel of element_name
@@ -3217,7 +3218,7 @@
                                     if (!(newPixel.element == pixel.element)) {
                                         if (arg != null) {arg = parseFloat(arg)}
                                         else {arg = 1}
-                                        if (arg == NaN) {arg = 1}
+                                        if (isNaN(arg)) {arg = 1}
                                         newPixel.temp += arg;
                                         pixelTempCheck(newPixel);
                                     }
@@ -3230,7 +3231,7 @@
                                     if (!(newPixel.element == pixel.element)) {
                                         if (arg != null) {arg = parseFloat(arg)}
                                         else {arg = 1}
-                                        if (arg == NaN) {arg = 1}
+                                        if (isNaN(arg)) {arg = 1}
                                         newPixel.temp -= arg;
                                         pixelTempCheck(newPixel);
                                     }