docs

README.md

@@ -24,11 +24,14 @@ or clone the repo:
 
 ## Use ImageMagick instead of gm
 
-Subclass `gm` to enable ImageMagick
+Subclass `gm` to enable ImageMagick, optionally specifying the path to the executable.
 
 ```js
-var fs = require('fs')
-  , gm = require('gm').subClass({imageMagick: true});
+const fs = require('fs')
+const gm = require('gm').subClass({
+  imageMagick: true,
+  appPath: String.raw`C:\Program Files\ImageMagick-7.1.0-Q16-HDRI\magick.exe`
+});
 
 // resize and remove EXIF profile data
 gm('/path/to/my/img.jpg')