Bootstrap/site/content/docs/4.3/customize/options.md

layout	title	description	group
docs	Options	Quickly customize Bootstrap with built-in variables to easily toggle global CSS preferences for controlling style and behavior.	customize

Customize Bootstrap with our built-in custom variables file and easily toggle global CSS preferences with new $enable-* Sass variables. Override a variable's value and recompile with npm run test as needed.

You can find and customize these variables for key global options in Bootstrap's scss/_variables.scss file.

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Variable	Values	Description
$spacer	1rem (default), or any value > 0	Specifies the default spacer value to programmatically generate our [spacer utilities]({{< docsref "/utilities/spacing" >}}).
$enable-rounded	true (default) or false	Enables predefined border-radius styles on various components.
$enable-shadows	true or false (default)	Enables predefined box-shadow styles on various components.
$enable-gradients	true or false (default)	Enables predefined gradients via background-image styles on various components.
$enable-transitions	true (default) or false	Enables predefined transitions on various components.
$enable-reduced-motion	true (default) or false	Enables the [prefers-reduced-motion media query]({{< docsref "/getting-started/accessibility#reduced-motion" >}}), which suppresses certain animations/transitions based on the users' browser/operating system preferences.
$enable-grid-classes	true (default) or false	Enables the generation of CSS classes for the grid system (e.g. .row, .col-md-1, etc.).
$enable-caret	true (default) or false	Enables pseudo element caret on .dropdown-toggle.
$enable-button-pointers	true (default) or false	Add "hand" cursor to non-disabled button elements.
$enable-rfs	true (default) or false	Globally enables [RFS]({{< docsref "/getting-started/rfs" >}}).
$enable-validation-icons	true (default) or false	Enables background-image icons within textual inputs and some custom forms for validation states.
$enable-negative-margins	true or false (default)	Enables the generation of [negative margin utilities]({{< docsref "/utilities/spacing#negative-margin" >}}).
$enable-deprecation-messages	true or false (default)	Set to true to show warnings when using any of the deprecated mixins and functions that are planned to be removed in v5.
$enable-important-utilities	true (default) or false	Enables the !important suffix in utility classes.
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