How to turn server textures off in Minecraft?

I want to turn the server textures off but I can't see server textures in the options can you please give me step by step instructions on how to find it (I have optifine installed)

They recently removed the server textures button from options, now it's in a pretty funky place.
1. Go to your server list
2. Click on any server
3. Click "Edit"
4. Choose whether or not to enable or disable server resource packs. Or you can choose to have the server prompt you.

Hope this helped:]