Updated Implementing a ruleset editor (markdown)

Implementing-a-ruleset-editor.md

@@ -52,4 +52,27 @@ public class TestSceneEditor : EditorTestScene
 }
 ```
 
-Running your visual tests, you should now see the editor in a relatively good visual state.
+Running your visual tests, you should now see the editor in a relatively good visual state. You should also notice that basic object movement in the timeline should work as expected, as long as you are doing all `DrawableHitObject` visual update logic in `UpdateState`. This is because `HitObject`'s `StartTime` bindable handling is done for you.
+
+## Making selection and movement work in the compose area
+
+If you are a scrolling ruleset, you will also benefit from selection logic automatically working in the main compose area too.
+
+If not, *todo*
+
+## Keeping DrawableHitObjects compatible with the editor
+
+*todo*
+
+## Creating a custom selection handler
+
+*todo*
+
+## Creating composer blueprints
+
+*todo*
+
+
+## Creating placement tools
+
+*todo*