The main menu of Share is implemented with the new Aikau UI development framework. It is possible to customize this menu, so you can navigate to new custom pages for example.
Architecture Information:Share Architecture
The main menu and title in Share is implemented in Aikau, it looks like this:

Adding and removing menu items from the menu is a common task. To do this we use aSurf Extension Module. It will look something like this:
<extension> <modules> <module> <id>Add custom menu item to header</id> <version>1.0</version> <auto-deploy>true</auto-deploy> <customizations> <customization> <targetPackageRoot>org.alfresco.share.header</targetPackageRoot> <sourcePackageRoot>com.example.header</sourcePackageRoot> </customization> </customizations> </module> </modules></extension>So we are targeting the/share/WEB-INF/classes/alfresco/site-webscripts/org/alfresco/share/header/share-header.get.js web script controller file, which implements the menu JSON model. Now, if we want to for example add a menu item we need to create a file with the same name and put it inalfresco/web-extension/site-webscripts/com/example/header. The file will look like this:
var headerMenu = widgetUtils.findObject(model.jsonModel, "id", "HEADER_APP_MENU_BAR");if (headerMenu != null) { headerMenu.config.widgets.push({ id: "HEADER_CUSTOM_PROFILE_LINK", name: "alfresco/menus/AlfMenuBarItem", config: { label: "My profile", targetUrl: "user/" + encodeURIComponent(user.name) + "/profile" } });}This is all that is required to extend an existing JSON model. We’re usingwidgetUtils to find theHEADER_APP_MENU_BAR widget. Once we have it, we simply push a widget into it.
tomcat/shared/classes/alfresco/web-extension/site-webscripts - put the files that are overriding heretomcat/shared/classes/alfresco/web-extension/site-data/extensions - put the Extension Module here.(Untouched by re-deployments and upgrades)
aio/share-jar/src/main/resources/alfresco/web-extension/site-webscripts - put the files that are overriding hereaio/share-jar/src/main/resources/alfresco/web-extension/site-data/extensions - put the Extension Module here.