Learn more about some miscellaneous styling features used in Sandbox.


Sandbox adds additional spacing variables to existing Bootstrap spacing ranging between values 0 and 25

Font Size

Quickly change the font-size of text using .fs-* classes ranging between 1 and 200, while sm, and lg also apply.

Line Height

Change the line height with .lh-* utilities.

Letter Spacing

Change the letter spacing with .ls-* utilities.


Spacing variables mentioned above can also be used for column gutters. More information regarding Bootstrap gutters can be found on Bootstrap docs

Retina Images

In order to display a high resolution image on devices with retina display, you need two versions of the image. One with regular size and another with twice its size. The high resolution one should have the exact same name with @2x at the end.

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