The stretch CSS keyword expands a box as needed to fit its contents until the maximum size is reached, without preserving the content's preferred aspect ratio.

The justify-self CSS property aligns an item along a container's inline axis in block layouts, like it does in grid layouts. Likewise, the justify-items property sets a default justify-self value for all items in a container in a block layout.

The page-orientation CSS property sets the rotation of a page after pagination. This allows pages with the same size declaration to display with different orientations.

In columnar layouts (created by the columns or column-count CSS properties), the break-after, break-before, break-inside properties control where columns start or end.

The page-break-before, page-break-inside, and page-break-after CSS properties are aliases to the break-before, break-inside, and break-after properties.

The widows and orphans CSS properties set the minimum lines included in a text fragment created by page, column, or region breaks.

The display: grid-lanes and display: inline-grid-lanes CSS declarations create a layout where items are tightly packed in parallel lanes. Items are placed one by one in the lane that has the most available space. Also known as masonry.

The fit-content() CSS function, used outside of a grid layout property, clamps a length between min-content and max-content.