• framed, which puts an ordinary frame box around the region,
• shaded, which shades the region, and
• leftbar, which places a line at the left side. The environments allow a break at their start (the \FrameCommand enables creation of a title that is “attached” to the environment); breaks are also allowed in the course of the framed/shaded matter.

See also mdframed.

The author is Donald Arseneau. The package is Copyright © 1992-2011 Donald Arseneau.