When I create a page I'm suppose to describe the content on the editor of Wordpress. When it's a simple text with some images its ok.
But the problem is: My custom layout has a lot of deep HTML and I want to allow the client to change the dynamic text parts easily, and avoid him from having HTML parts inside the rich text editor.
Wordpress has some built-in feature to accomplish that or some plugin maybe?
An similar idea is this plugin that I've found, but not for pages specifically: http://wordpress.org/extend/plugins/text-replace