Now in the galleries and blogpost you have an option to extend the certain gallery or post layout and add a block that relates to this gallery or post only.
Lets say the photoshoot was featured in the magazine and you want to show it in the blogpost, or add testimonial from this client at the bottom of the post. Or add an option to contact you for the same service as described in the post and you want to insert contact option to this blogpost only (like we added to this post you are viewing now).
Just click “Use custom layout for this post” and in Custom Layout tab add a new block. For the current post we added a Contact block while it’s not available in other blogposts.