GITBOOK-609: Document Buttons + add some calls to action.

Author: emmerich

README.md

@@ -1,9 +1,9 @@
 ---
-icon: book-open
 description: >-
   Create and publish beautiful documentation your users will love. GitBook has
   all the tools you need to create everything from product guides to API
   references and beyond.
+icon: book-open
 layout:
   title:
     visible: true
@@ -21,7 +21,7 @@ layout:
 
 At GitBook, our mission is to provide a **user-friendly** and **collaborative** solution for creating, editing, and sharing product and API documentation.
 
-Head to our [Quickstart guide](getting-started/quickstart.md) to set up your first docs site in minutes.
+<a href="https://app.gitbook.com/join" class="button primary">Sign up</a> <a href="getting-started/quickstart.md" class="button secondary">Quickstart</a>
 
 ### Discover GitBook&#x20;
 

creating-content/formatting/inline.md

@@ -4,7 +4,7 @@ description: Use the inline palette to add images, links, math & TeX, and more
 
 # Inline content
 
-<figure><img src="../../.gitbook/assets/10_01_25_inline_content.svg" alt=""><figcaption><p>Add inline content to your content.</p></figcaption></figure>
+<figure><img src="../../.gitbook/assets/10_01_25_inline_content.svg" alt=""><figcaption><p>Add inline elements to your content.</p></figcaption></figure>
 
 The inline palette lets you quickly add extra content to your text block without moving your hands away from the keyboard. Simply hit `/` on any text block to open the inline palette. The forward slash will be replaced by the content you choose to insert.
 
@@ -101,3 +101,11 @@ Using this option, you can create an inline math formula in your content, like t
 {% hint style="info" %}
 You can also insert [a block-level math formula](../blocks/math-and-tex.md) by opening the command palette in an empty block and choosing the second Math & TeX option.
 {% endhint %}
+
+### Buttons
+
+Buttons are a great way to describe calls to action. You can use them to send users to other pages in GitBook, or to external URLs.
+
+Buttons have both primary and secondary styles. Here are a couple of examples:
+
+<a href="https://app.gitbook.com/join" class="button primary">Sign up to GitBook</a> <a href="inline.md#annotations" class="button secondary">Go to top</a>

getting-started/quickstart.md

@@ -7,7 +7,9 @@ icon: bolt
 
 ### Getting started
 
-You’ll need a GitBook account to start publishing documentation. If you don’t already have an account, you can sign up for free [here](https://app.gitbook.com/join).
+You’ll need a GitBook account to start publishing documentation.
+
+<a href="https://app.gitbook.com/join" class="button primary">Sign up</a>
 
 ### Create a docs site