diff --git a/src/renderer/CursorRenderLayer.ts b/src/renderer/CursorRenderLayer.ts
index 1e5cf647..1533c4f2 100644
--- a/src/renderer/CursorRenderLayer.ts
+++ b/src/renderer/CursorRenderLayer.ts
@@ -38,7 +38,6 @@ export class CursorRenderLayer extends BaseRenderLayer {
   }
 
   public onOptionsChanged(terminal: ITerminal): void {
-    super.onOptionsChanged(terminal);
     if (terminal.options.cursorBlink) {
       if (!this._cursorBlinkStateManager) {
         this._cursorBlinkStateManager = new CursorBlinkStateManager(terminal, () => {
diff --git a/src/renderer/Interfaces.ts b/src/renderer/Interfaces.ts
index 5626f13d..45822e65 100644
--- a/src/renderer/Interfaces.ts
+++ b/src/renderer/Interfaces.ts
@@ -1,10 +1,30 @@
 import { ITerminal, ITerminalOptions } from '../Interfaces';
 
 export interface IRenderLayer {
+  /**
+   * Called when the cursor is moved.
+   */
   onCursorMove(terminal: ITerminal): void;
+
+  /**
+   * Called when options change.
+   */
   onOptionsChanged(terminal: ITerminal): void;
+
+  /**
+   * Called when the theme changes.
+   */
   onThemeChanged(terminal: ITerminal, colorSet: IColorSet): void;
+
+  /**
+   * Called when the data in the grid has changed (or needs to be rendered
+   * again).
+   */
   onGridChanged(terminal: ITerminal, startRow: number, endRow: number): void;
+
+  /**
+   * Calls when the selection changes.
+   */
   onSelectionChanged(terminal: ITerminal, start: [number, number], end: [number, number]): void;
 
   /**