Feature request: `legend.key.spacing` argument(s) added to `theme`

[davidhodge931]

The new reworked legend spacing will allow the spacing between legend key/label elements to be controlled with guide_legend(key.spacing = ...)

It'd be great if you could allow this to be modified through the theme argument as well.

Otherwise, users cannot incorporate their desired legend key spacing up in a theme function. They have to instead use the guides each time they make a plot to adjust it how they want.

Thanks, and great work with the ggplot2 development!

[teunbrand]

Thank that is a good argument. The reason it wasn't done this way is because the key spacing doesn't apply universally to every non-position guide but only to legends, but I can see the merit in setting this in the theme.

[teunbrand]

Probably makes most sense to implement this after #5512 is merged.

[davidhodge931]

It'd be awesome, if this could scale with the base_size by default

[teunbrand]

It currently does that implicitly, but might indeed be better to do this explicitly.