docs: fix and improve the description of the default reveal width

diff --git a/docs/pages/reveal.md b/docs/pages/reveal.md
index b391ea81c43fad494f6aebc652cc48234dc68f72..efaeab93333162d3a1e4c84aa448a8b7bbf51477 100644 (file)
--- a/docs/pages/reveal.md
+++ b/docs/pages/reveal.md
@@ -64,7 +64,7 @@ You can use our handy [close button](close-button.html) styles to do this:
 
 ## Sizing
 
-On small screens, a modal is always 100% of the width of the screen. On medium-sized screens and larger, the width changes to 80%.
+On small screens, a modal is always 100% of the width of the screen. On medium-sized screens and larger, the width changes to 600px. If you're using the Sass version of Foundation, edit the `$reveal-width` variable to change this. This can be a percentage value, or a pixel value.
 
 The size of a modal can be changed with these sizing classes, which are added to the modal container: