I want to represent, say, the closure of a set or the extended reals, e.g., `$\bar{\mathbb{R}}$`

but unfortunately this creates a bar that is much too small (horizontally) and can barely be seen. On the other hand, `$\overline{\mathbb{R}}$`

creates a line that is too long. I need something that's just right, in between the bar and the overline. What would be my best choice?

# [Tex/LaTex] The \bar and \overline commands

stacking-symbols

## Best Answer

Here is a command

`\xoverline[width percent]{symb}`

that will do it. Note that it will not scale inside sub or superscripts. If you need that, everthing has to go through a`\mathchoice`

resulting in a lot more complex code.