# Annotations and Markdown One of the biggest benefits and problems with Markdown is _everything is visible_. All the markup is visible, all of the time. Sometimes this isn't a problem, and the advantage is that it's human-readable. But some markup it would be nice to hide or elide in certain circumstances. The main one I'm thinking of is inline commenting. I like to copy-edit as I write - introduce comments and highlights. Think Google Docs. This simply isn't possible in Markdown without some real awkwardness. See [Critic Markup](https://github.com/CriticMarkup/CriticMarkup-toolkit) for an example of how bad it can be. Extending Markdown to support this leads to madness. Markdown should be an *output* of an intermediate format. Provide [[credible exit]] without requiring markdown be the core format. Related: [[Markdown Lake]].