How do I activate Optifine?

How do I activate Optifine?
Here’s how:

Open the Minecraft Launcher and click the arrow to the left of the PLAY button.
Select the OptiFine installation.
Click PLAY.
You’ll find your OptiFine controls in the main menu under Options > Video Settings. Some common OptiFine controls are Shaders, Details, and Animations.

Here’s how:
  1. Open the Minecraft Launcher and click the arrow to the left of the PLAY button.
  2. Select the OptiFine installation.
  3. Click PLAY.
  4. You’ll find your OptiFine controls in the main menu under Options > Video Settings. Some common OptiFine controls are Shaders, Details, and Animations.