The Repositories pane, as shown in the following screenshot, displays the repositories you have created or connected to and their contents organized in a tree structure.
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The Refresh button REPLACE WITH THIS IMAGE: Images/Common_Icons/refresh.png performs a complete reload of the contents of the tree which can be useful to force 3D to immediately detect major changes in remote repositories.
Using the Search field you can quickly find a source, table, column, schema, etc. in your repository tree. For more information on search and filtering refer to the Search and Filtering documentation.