Layout builder

Benefits:

• Build layouts using GUI - arrange fields in columns/blocks (or add a block, or menu, or tag cloud, user info etc.) 
• Easily override layout of individual nodes without needing to clone/design/apply a template (and reset to default easily afterwards)

Status:

Nov 2018: core, experimental in 8.6.x
May 1 2019: due for stable release in 8.7.0

Issue queue

Installation:

• Enable the layout_builder module (which also enables layout_discovery)
• Clear cache.

• Activation:  Content type -> Manage Display -> scroll down to Layout Options - tick Use Layout builder

By turning on Layout Builder, you switch from the standard Manage Display view (field, label, format/widget settings) and the layout builder GUI.

Resources:

• Explanation by Dries of key features
• OS Training tutorial
• Layout initiative

Compatibility:

• A migration path is being built for Panels / Panelizer.
• Undecided (Nov 2018) how Layout builder will work in conjunction with Paragraphs