diff --git a/README.md b/README.md
index 49ff33a..208b4b0 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ Ronin helpers are keywords that facilitates adding coordinates from the canvas i
 
 - `(import path shape)` Imports a graphic file with format.
 - `(export path ~format ~quality)` Exports a graphic file with format.
-- `(open path)` Imports a graphic file and resizes the frame.
+- `(open path ~ratio)` Imports a graphic file and resizes the frame.
 - `(move x y)` 
 - `(rotate angle)` 
 - `(scale x y)` 
@@ -49,7 +49,7 @@ Ronin helpers are keywords that facilitates adding coordinates from the canvas i
 - `(resetTransform)` 
 - `(pushTransform)` 
 - `(popTransform)` 
-- `(pos x y)` Returns a position shape.
+- `(pos ~x ~y)` Returns a position shape.
 - `(size w h)` Returns a size shape.
 - `(rect x y w h)` Returns a rect shape.
 - `(circle cx cy r)` Returns a circle shape.
@@ -60,7 +60,7 @@ Ronin helpers are keywords that facilitates adding coordinates from the canvas i
 - `(stroke ~shape)` Strokes a shape.
 - `(fill ~rect)` Fills a shape.
 - `(gradient line ~colors 'black'])` Defines a gradient color.
-- `(guide shape)` Draws a shape on the guide layer.
+- `(guide shape color)` Draws a shape on the guide layer.
 - `(clear ~rect)` Clears a rect.
 - `(frame)` Returns a rect of the frame.
 - `(center)` Returns a position of the center of the frame.
@@ -68,7 +68,7 @@ Ronin helpers are keywords that facilitates adding coordinates from the canvas i
 - `(rescale w h)` Rescales the canvas to target ratio of w and h, returns the rect.
 - `(crop rect)` Crop canvas to rect.
 - `(clone a b)` 
-- `(drag x y ~rect)` 
+- `(drag ~rect)` 
 - `(theme variable ~el)` 
 - `(pixels rect fn q)` 
 - `(saturation pixel ~q)` 
diff --git a/desktop/sources/scripts/library.js b/desktop/sources/scripts/library.js
index 88fc713..8e7d0a5 100644
--- a/desktop/sources/scripts/library.js
+++ b/desktop/sources/scripts/library.js
@@ -13,8 +13,8 @@ function Library (ronin) {
     return path
   }
 
-  this.open = async (path) => { // Imports a graphic file and resizes the frame.
-    return ronin.surface.open(path)
+  this.open = async (path, ratio = 1) => { // Imports a graphic file and resizes the frame.
+    return ronin.surface.open(path, ratio)
   }
 
   // Transforms
diff --git a/desktop/sources/scripts/surface.js b/desktop/sources/scripts/surface.js
index b67de4a..a25a14e 100644
--- a/desktop/sources/scripts/surface.js
+++ b/desktop/sources/scripts/surface.js
@@ -121,15 +121,15 @@ function Surface (ronin) {
 
   // IO
 
-  this.open = function (path) {
+  this.open = function (path, ratio = 1) {
     return new Promise(resolve => {
       const img = new Image()
       img.src = path
       img.onload = () => {
-        ronin.log(`Open ${img.width}x${img.height}`)
-        const rect = { x: 0, y: 0, w: img.width, h: img.height }
+        const rect = { x: 0, y: 0, w: parseInt(img.width * ratio), h: parseInt(img.height * ratio) }
+        ronin.log(`Open ${rect.w}x${rect.h}`)
         this.resize(rect, true)
-        this.context.drawImage(img, 0, 0, img.width, img.height)
+        this.context.drawImage(img, 0, 0, rect.w, rect.h)
         resolve()
       }
     })