# Re: changing margins in article class when using Beamer

```On 08/11/2009 03:27 PM, Graham M Smith wrote:
```
I'm using Beamer, and producing a presentation handout by switching to the beamer article class, which defaults to wide margins.
```
```
If I change the margins in documents settings, this then prevents the beamer slides being produced (I get a compile error). I assume I can put something in the preamble that will switch the margins for beamer article only, but don't know what this might be.
```
```
If you can find some macro that is defined in this case, but not in the other case, then all you need is:
```    \ifx\thatmacro\undefined\relax\else