A bit more static image doc

externs/olx.js

@@ -4573,7 +4573,11 @@ olx.source.ImageStaticOptions.prototype.attributions;
 
 
 /**
- * crossOrigin setting for image requests.
+ * The `crossOrigin` attribute for loaded images.  Note that you must provide a
+ * `crossOrigin` value if you are using the WebGL renderer or if you want to
+ * access pixel data with the Canvas renderer.  See
+ * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image}
+ * for more detail.
  * @type {null|string|undefined}
  * @api stable
  */
@@ -4581,7 +4585,8 @@ olx.source.ImageStaticOptions.prototype.crossOrigin;
 
 
 /**
- * Extent of the image.
+ * Extent of the image in map coordinates.  This is the [left, bottom, right,
+ * top] map coordinates of your image.
  * @type {ol.Extent}
  * @api stable
  */
@@ -4589,7 +4594,7 @@ olx.source.ImageStaticOptions.prototype.imageExtent;
 
 
 /**
- * Size of the image.
+ * Size of the image in pixels.
  * @type {ol.Size|undefined}
  * @api stable
  */
@@ -4605,7 +4610,7 @@ olx.source.ImageStaticOptions.prototype.imageLoadFunction;
 
 
 /**
- * Logo.
+ * Optional logo.
  * @type {string|olx.LogoOptions|undefined}
  * @api stable
  */
@@ -4621,7 +4626,7 @@ olx.source.ImageStaticOptions.prototype.projection;
 
 
 /**
- * Url.
+ * Image URL.
  * @type {string}
  * @api stable
  */

src/ol/source/imagestaticsource.js

@@ -10,8 +10,7 @@ goog.require('ol.source.Image');
 
 /**
  * @classdesc
- * An image source for 'static', that is, non-georeferenced, images.
- * See examples/static-image for example.
+ * A layer source for displaying a single, static image.
  *
  * @constructor
  * @extends {ol.source.Image}