Adding initial documentation for the site footer

Author: VesaJuvonen

docs/features/site-footer.md

@@ -0,0 +1,67 @@
+---
+title: Overview of the SharePoint Site footer
+description: SharePoint Site footers can be used to show a logo or set of links/labels in a modern SharePoint site. They can be configured using the UI settings or by using APIs.
+ms.date: 1/22/2019
+localization_priority: Priority
+---
+
+# SharePoint Site Footer
+
+Footers are a common branding / navigation control in websites and portals. SharePoint Communication sites will have an out-of-the box footer control, which can be controlled either using UI elements or by using APIs. This control supports following elements
+
+- 8 links or labels
+- Footer logo or footer name
+
+> [!NOTE]
+> Site footers are current supported only in modern pages of communication sites. This feature is scheduled to start production roll out in January 2019.
+
+> [!IMPORTANT]
+> Footer will be enabled by default for all new and existing communication sites when the faeture is initially rolled out.
+
+## Footer with a logo
+
+Following picture demonstrates a footer with a logo with additional labels and links.
+
+![Image showing a site footer with a logo](../images/footer-with-a-logo.png)
+
+## Footer with a label
+
+Following picture demonstrates a footer with a label with additional labels and links.
+
+![Image showing a site footer with a label](../images/footer-with-a-label.png)
+
+## Controlling footer rendering using code or PowerShell
+
+When this feature is initially released, all new and existing communication sites will get a footer by default. If you do not want the out-of-box footer in your existing communication site, you can pre-emptively turn it off before the feature rolls out to your site or disable the footer after feature is enabled.
+
+You can control the footer existence with a `FooterEnabled` property in the `Web` object. Following PowerShell scripts shows how this can be done using [PnP PowerShell cmdlets](https://docs.microsoft.com/en-us/powershell/sharepoint/sharepoint-pnp/sharepoint-pnp-cmdlets?view=sharepoint-ps):
+
+```ps
+
+Connect-PnPOnline -Url "<SiteURL>" –Credentials (Get-Credential) 
+$web = Get-PnPWeb 
+$web.FooterEnabled = $false 
+$web.Update() 
+Invoke-PnPQuery  
+
+```
+
+> [!NOTE]
+> Above PowerShell scripts assumes that you have already installed PnP PowerShell cmdlets for your environment and you are not using multi-factor authentication. You can install PnP PowerShell cmdlets to your computer by opening PowerShell console in administrative mode and executing following command: `Install-Module SharePointPnPPowerShellOnline`. If you are using multi-factor authentication, you can enable MFA login by updating the `Connect-PnPOnline` line as follows: `Connect-PnPOnline -Url "<SiteURL>" -UseWebLogin`.
+
+## Controlling footer using the user interface
+
+Site owner can control the footer visibility using the **Change the look** functionality of the site, which exposes the different user interface configuration options.
+
+> [!NOTE]
+> These options will be visible in the sites when the feature(s) are rolled out and released.
+
+![Change the look configuration options](../images/footer-change-the-look.png)
+
+Footer configuration has multiple different options, which can be configured based on the site objectives.
+
+![Footer UI configuration options](../images/footer-ui-configuration.png)
+
+## See also
+
+- [Change the look of your SharePoint site](https://support.office.com/en-us/article/change-the-look-of-your-sharepoint-site-06bbadc3-6b04-4a60-9d14-894f6a170818)

docs/images/footer-change-the-look.png

@@ -397,7 +397,9 @@
   - name: View formatting
     href: declarative-customization/view-formatting.md       
   - name: Communication site
-    href: apis/communication-site-creation-rest.md     
+    href: apis/communication-site-creation-rest.md
+  - name: Site Footer
+    href: features/site-footer.md    
   - name: Shorter share links
     href: spfx/shorter-share-link-format.md
 - name: SharePoint development overview