From dfa98a11380ef2c45eaf1fda93145813f6cf25bd Mon Sep 17 00:00:00 2001
From: Dan Dascalescu <ddascalescu+github@gmail.com>
Date: Tue, 13 Nov 2012 01:47:02 -0800
Subject: [PATCH] Document vertical centering breaking backcompat
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Essentially, slides have variable height now. This is not normally visible, but with transitions that have a non-transparent background, like `cube` or `page`, it is:




http://lab.hakim.se/reveal-js/?transition=cube




Before, slides had a fixed height, which means that presentations designed with that assumption in mind will look very different now.




Another aspect that I bumped into is that I used the slide's height to dynamically size images to fill the remainder of the space from the heading to the footer, like this (stripped to the essence):




          bigImage.style.height = section.offsetHeight - bigImage.offsetTop + 'px';




Alternatively, is there an easy way to restore the previous functionality?
---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 6c07a33..0d6e3ac 100644
--- a/README.md
+++ b/README.md
@@ -93,6 +93,8 @@ Reveal.initialize({
 });
 ```
 
+Note that the new default vertical centering option will break compatibility with slides that were using transitions with backgrounds (`cube` and `page`). To restore the previous behavior, set `center` to `false`.
+
 ### Dependencies
 
 Reveal.js doesn't _rely_ on any third party scripts to work but a few optional libraries are included by default. These libraries are loaded as dependencies in the order they appear, for example:
-- 
GitLab