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+---
+layout: article
+title: Libraries
+description: Libraries in Data Controller are configurable in different ways according to the SAS flavour in use.
+og_image: img/libraries.png
+---
+
+# Adding Libraries to Data Controller
+
+The process for adding new libraries to Data Controller depends on whether we are talking about:
+
+* The VIEW or EDIT menu
+* Which flavour of SAS is being used
+
+In VIEW mode, all available libraries are shown, unless the [DC_RESTRICT_VIEWER](/dcc-options/#dc_restrict_viewer) option is set.
+
+In EDIT mode, only the libraries corresponding to the configuration in [MPE_TABLES](/dcc-tables) are visible.  This list may be shorter if the user is not in the [admin group](/dcc-groups/#data-controller-admin-group) or does not have the necessary [security](/dcc-security/) settings.
+
+![library list](img/libraries.png)
+
+Flavour specific guidance is below.
+
+## Viya Libraries
+
+Library definitions should be added in the `autoexec.sas` of the configured Compute Context using Environment Manager.
+
+## SAS 9 EBI Libraries
+
+Library definitions can be added in the `[DC Meta Path]/services/public/Data_Controller_Settings` stored process, IF required.  In most cases, libname statements are NOT required because they are taken from metadata.
+
+For the VIEW menu, the libname statement is made using the [mm_assignlib](https://core.sasjs.io/mm__assignlib_8sas.html) macro (META engine).  It is important that each library has a unique (up to 8 char) LIBREF.
+
+For the EDIT menu, direct libname statements are derived using the [mm_assigndirectlib](https://core.sasjs.io/mm__assigndirectlib_8sas.html) macro.
+
+## SASjs Server Libraries
+
+New library definitions can be added in the `[DC Drive Path]/services/public/settings.sas` stored program.
diff --git a/mkdocs.yml b/mkdocs.yml
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+++ b/mkdocs.yml
@@ -31,6 +31,7 @@ nav:
     - Excel Formulas: excel.md
     - Formats: formats.md
     - Groups: dcc-groups.md
+    - Libraries: libraries.md
     - Options: dcc-options.md
     - Row Level Security: row-level-security.md
     - Security: dcc-security.md