setting-column-breakpoint

$column-breakpoint: false !default;

setting-column-breakpoint-example1

// Example 1a: manually define breakpoint of a single expression
$column-breakpoint: (max-width 30em);

// Example 2a: manually define breakpoint of multiple expressions
$column-breakpoint: (min-width 30em) , (max-width 60em) , (min-resolution 220dpi);

setting-column-breakpoint-example2

// Example 2: predefined breakpoints
$small_handheld_tall: (max-width px-to-em(480px,$base-font-size)) , (orientation portrait) !default;
$small_handheld_wide: (max-width px-to-em(480px,$base-font-size)) , (orientation landscape) !default;

$column-breakpoint: $small_handheld_wide;