portfolio/pages: add additional references

(cherry picked from commit f319616d)

source/portfolio/pages.rst

@@ -30,6 +30,8 @@ You can re-use the artefacts that you collected in as many pages as you wish.
 .. index::
    single: Portfolios; Overview
 
+.. _portfolio_overview_page:
+
 Overview page
 ~~~~~~~~~~~~~~
 
@@ -98,10 +100,12 @@ On *Pages and collections*, you can do the following.
    single: Portfolio; Icons on the overview page
 
 Icons on the overview page
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 The page and collection information boxes display a number of icons, which are described in more detail here.
 
+.. _portfolio_overview_share:
+
 Share your portfolio with others
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -116,6 +120,8 @@ If you have not yet shared your portfolio with somebody else, you see the *Locke
 #. The icon turns into a downwards facing menu chevron |menu open|. A drop-down menu opens.
 #. Click the *Manage access* option to share your portfolio with others on the site. You are taken to the :ref:`Edit access <edit_access>` screen where you can choose with whom to share your portfolio.
 
+.. _portfolio_overview_review_sharing:
+
 Review existing sharing permissions
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -141,6 +147,8 @@ If you already shared your portfolio with others, you see the *Unlocked* icon |u
 .. note::
    Start or end dates or whether copying is allowed are not displayed in the drop-down menu. You need to go to the :ref:`Share <share>` screen to see that additional information.
 
+.. _portfolio_overview_access_page:
+
 Access pages within a collection
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -167,6 +175,8 @@ You can view how many pages are part of a collection and what their titles are b
 #. All other pages are are listed with the *Single page* icon |single page|.
 #. Click the page you want to view.
 
+.. _portfolio_overview_more_options:
+
 More options
 ^^^^^^^^^^^^^^^^^^^^^^^^