More examples in across() documentation

[AmeliaMN]

When I use across() I almost always want to do the thing to every single column. For whatever reason, that tidyselect action is hard for me to remember/find. Is it all()? Is it everything()? Etc. It would be great to have an example in the across() documentation that does the thing to every column. Additionally, it would be awesome to have an example that does the thing conditionally depending on the variable type. For example, rounding all the numeric variables.

[marcuslehr]

I second this. Honestly I find across() super confusing and frequently revert to the _if/_at/_all functions to do what I'm trying to do. I've tried to learn across() several times and I either can't figure out how to make it work or it's very painful. I'd frankly be onboard with reverting to the legacy functions, but I'm sure that won't happen so some better examples in the doc would certainly help.