Update user's profile preferences docs

- Document all options
- Change links that point to docs in the application

app/views/profiles/preferences/show.html.haml

@@ -6,7 +6,9 @@
     %h4.prepend-top-0
       Syntax highlighting theme
     %p
-      This setting allow you to customize the appearance of the syntax.
+      This setting allows you to customize the appearance of the syntax.
+      = succeed '.' do
+        = link_to 'Learn more', help_page_path('user/profile/preferences', anchor: 'syntax-highlighting-theme'), target: '_blank'
   .col-lg-9.syntax-theme
     - Gitlab::ColorSchemes.each do |scheme|
       = label_tag do
@@ -20,6 +22,8 @@
       Behavior
     %p
       This setting allows you to customize the behavior of the system layout and default views.
+      = succeed '.' do
+        = link_to 'Learn more', help_page_path('user/profile/preferences', anchor: 'behavior'), target: '_blank'
   .col-lg-9
     .form-group
       = f.label :layout, class: 'label-light' do
@@ -29,13 +33,11 @@
         Choose between fixed (max. 1200px) and fluid (100%) application layout.
     .form-group
       = f.label :dashboard, class: 'label-light' do
-        Default Dashboard
-        = link_to('(?)', help_page_path('profile/preferences') + '#default-dashboard', target: '_blank')
+        Default dashboard
       = f.select :dashboard, dashboard_choices, {}, class: 'form-control'
     .form-group
       = f.label :project_view, class: 'label-light' do
         Project view
-        = link_to('(?)', help_page_path('profile/preferences') + '#default-project-view', target: '_blank')
       = f.select :project_view, project_view_choices, {}, class: 'form-control'
       .help-block
         Choose what content you want to see on a project's home page.

doc/profile/README.md

-# Profile Settings
+# Profile settings
 
-- [Preferences](preferences.md)
-- [Two-factor Authentication (2FA)](two_factor_authentication.md)
+- [Preferences](../user/profile/preferences.md)
+- [Two-factor Authentication (2FA)](../user/profile/account/two_factor_authentication.md)

doc/profile/preferences.md

-# Profile Preferences
-
-Settings in the **Profile > Preferences** page allow the user to customize
-various aspects of the site to their liking.
-
-## Syntax highlighting theme
-
-_GitLab uses the [rouge ruby library][rouge] for syntax highlighting. For a
-list of supported languages visit the rouge website._
-
-Changing this setting allows the user to customize the theme used when viewing
-syntax highlighted code on the site.
-
-The default is **White**.
-
-## Behavior
-
-### Default Dashboard
-
-For users who have access to a large number of projects but only keep up with a
-select few, the amount of activity on the default Dashboard page can be
-overwhelming.
-
-Changing this setting allows the user to redefine what their default dashboard
-will be. Setting it to **Starred Projects** will make that Dashboard view the
-default when signing in or clicking the application logo in the upper left.
-
-The default is **Your Projects**.
-
-### Default Project view
-
-It allows user to choose what content he or she want to see on project page.
-
-The default is **Readme**.
-
-[rouge]: http://rouge.jneen.net/ "Rouge website"
+This document was moved to [another location](../user/profile/preferences.md).

doc/user/profile/preferences.md

+# Profile preferences
+
+A user's profile preferences page allows the user to customize various aspects
+of GitLab to their liking.
+
+To navigate to your profile's preferences, click your avatar icon in the top
+right corner and select **Settings**. From there on, choose the **Preferences**
+tab.
+
+## Syntax highlighting theme
+
+>**Note:**
+GitLab uses the [rouge Ruby library][rouge] for syntax highlighting. For a
+list of supported languages visit the rouge website.
+
+Changing this setting allows you to customize the color theme when viewing any
+syntax highlighted code on GitLab.
+
+The default one is **White**, and you can choose among 5 different colors:
+
+- White
+- Dark
+- Solarized light
+- Solarized dark
+- Monokai
+
+## Behavior
+
+The following settings allow you to customize the behavior of GitLab's layout
+and default views of your dashboard and the projects' landing pages.
+
+### Layout width
+
+GitLab can be set up to use different widths depending on your liking. Choose
+between the fixed (max. 1200px) and the fluid (100%) application layout.
+
+### Default dashboard
+
+For users who have access to a large number of projects but only keep up with a
+select few, the amount of activity on the default Dashboard page can be
+overwhelming. Changing this setting allows you to redefine what your default
+dashboard will be.
+
+You have 6 options here that you can use for your default dashboard view:
+
+- Your projects (default)
+- Starred projects
+- Your projects' activity
+- Starred projects' activity
+- Your groups
+- Your [Todos]
+
+### Default project view
+
+The default project view settings allows you to choose what content you want to
+see on a project's landing page.
+
+You can choose between 2 options:
+
+- Show the files and the readme (default)
+- Show the project's activity
+
+[rouge]: http://rouge.jneen.net/ "Rouge website"
+[todos]: ../../workflow/todos.md