Create layout-patterns.md

Author: ajford76

docs/design/layout-patterns.md

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+---
+title:  Layout patterns
+description: Common web part layout types and responsive patterns
+ms.date: 08/13/2018
+---
+
+# Web part layouts
+
+SharePoint uses a number of different layout types for web parts. The most commonly used of them are grid, list, filmstrip, carousel and compact. Each one of these five layouts serves a different purpose depending on a page layout, breakpoints and content density.
+
+![Carousel with icons representing the common layouts](../images/01_Layouts_webparts.png)
+
+## Secondary toolbars