\oval
.....
`\oval(width,height)[portion]'
The `\oval' command produces a rectangle with rounded corners. The
optional argument, `[portion]', allows you to select part of the oval.
* `t' - Selects the top portion
* `b' - Selects the bottom portion
* `r' - Selects the right portion
* `l' - Selects the left portion
Note that the "corners" of the oval are made with quarter circles
with a maximum radius of 20 pt, so large "ovals" will look more like
boxes with rounded corners.