where did "Blueprints" button go?

I am using UE4.12, and following this page
At “To open a Level Blueprint for editing, click the Blueprints button in the Level Editor Toolbar and select Open Level Blueprint.”

I need to open level blueprint, but have problem finding the 'Blueprints" button. Where is it moved to in UE4.12?

Are you sure you are in the Level Editor? Check the tabs, it’s usually the one on the far left: