added a table

Author: dcaiced0

design/index.md

@@ -14,11 +14,9 @@ Learn more about the types of Adobe XD plugins you can build.
 
 ![Panels and modals](ux-images/Design-xd-plugins-1.png)
 
-**Plugins Panel (Non-Blocking UI)**  
-This surface is best used when the user should have access to the canvas while using the plugin.
-
-**Modal Dialog (Blocking UI)**  
-This surface is best used when the plugin needs to run an action and the user shouldn’t modify or change selection of objects on the canvas.
+| **Plugins Panel (Non-Blocking UI)** | **Modal Dialog (Blocking UI)** |
+|-------------------------------------|--------------------------------|
+| This surface is best used when the user should have access to the canvas while using the plugin. | This surface is best used when the plugin needs to run an action and the user shouldn’t modify or change selection of objects on the canvas. |
 
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