To customize the size and position of elements in a layout, use the flex, offset, and flex-order attributes.

[flex]
[flex]
[flex]

Add the flex attribute to a layout's child element, and it will flex (stretch) to fill the available area.

[flex="33"]
[flex="55"]
[flex]
[flex]
[flex]

A layout child's flex attribute can be given an integer value from 0-100. The element will stretch to the percentage of available space matching the value.

The flex attribute value is restricted to 33, 66, and multiples of five.
For example: flex="5", flex="20", "flex="33", flex="50", flex="66", flex="75", ....

See the layout options page for more information on responsive flex attributes.

[flex-order="3"]
[flex-order="2"]
[flex-order="1"]

Add the flex-order attribute to a layout child to set its position within the layout. Any value from 0-9 is accepted.

flex-order Sets element order.
flex-order-sm Sets element order on devices less than 600px wide.
flex-order-gt-sm Sets element order on devices greater than 600px wide.
flex-order-md Sets element order on devices between 600px and 960px wide.
flex-order-gt-md Sets element order on devices greater than 960px wide.
flex-order-lg Sets element order on devices between 960px and 1200px wide.
flex-order-gt-lg Sets element order on devices greater than 1200px wide.