Minor reformatting/rewording

toji · toji · commit 166bb6dd443d · 2022-05-16T13:07:21.000-07:00
diff --git a/spec/index.bs b/spec/index.bs
@@ -1640,22 +1640,26 @@ interface GPU {
 
     : <dfn>getPreferredCanvasFormat()</dfn>
     ::
-        Returns an optimal {{GPUTextureFormat}} to use when calling
-        {{GPUCanvasContext/configure()}} on a {{GPUCanvasContext}}, for displaying
-        8-bit depth, standard dynamic range content to the screen: either
-        {{GPUTextureFormat/"rgba8unorm"}} or {{GPUTextureFormat/"bgra8unorm"}}.
+        Returns an optimal {{GPUTextureFormat}} for displaying 8-bit depth, standard dynamic range
+        content on this system. Must only return {{GPUTextureFormat/"rgba8unorm"}} or
+        {{GPUTextureFormat/"bgra8unorm"}}.
 
-        Canvases which are not displayed to the screen may or may not benefit from
-        using this format.
+        The returned value can be passed as the {{GPUCanvasConfiguration/format}} to
+        {{GPUCanvasContext/configure()}} calls on a {{GPUCanvasContext}} to ensure the associated
+        canvas is able to display its contents efficiently.
+
+        Note: Canvases which are not displayed to the screen may or may not benefit from using this
+        format.
 
         <div algorithm="GPU.getPreferredCanvasFormat">
             **Called on:** {{GPU}} this.
 
             **Returns:** {{GPUTextureFormat}}
 
             <div class=content-timeline>
-                1. Out of {{GPUTextureFormat/"rgba8unorm"}} and {{GPUTextureFormat/"bgra8unorm"}},
-                    return the format which is optimal for displaying WebGPU canvases on this system.
+                1. Return either {{GPUTextureFormat/"rgba8unorm"}} or
+                    {{GPUTextureFormat/"bgra8unorm"}}, depending on which format is optimal for
+                    displaying WebGPU canvases on this system.
             </div>
         </div>
 </dl>
