The Contao Back end manager can be limited to show only a certain number of items.  You can also help with optimization of the website so that the it appears quicker for your Back end administrators.  This helps to improve the Back end performance by reducing the number of items that are displayed at one time.  The following article explains how to locate and setup the Back end configuration settings.

Using the Contao Back end Configuration Settings

1. Login to the Contao Back end administrator.
2. Scroll down the left side until you find SYSTEM section.  Click on the SETTING option and you should see the options available for the Back end configuration. The table below explains the different fields
   
   

   Configuration settings	Description of setting
   Items per page	Limit the number of items displayed on a page
   Maximum items per page	Limit the number of items shown when SHOW ALL is selected
   Exclude folders from synchronization	Exclude folders that do not need to be part of a synchronization during an update; affects folders that need to be excluded from an automatic update
   Do not collapse elements	Changes how items will appear in the tree-style view; if selected all collapsible items will be expanded
   Files URL	Designates the files directory URL - used for page speed optimization
   Assets URL	Designates the assets directory URL  - used for page speed optimization

   
   Note:  File synchronization is done during an update either manually or automatically through the Contao Live Update Service.  The page speed optimization option is typically used where a CDN (Content Delivery Network) is integrated in order to deliver the files and assets of the Contao website.
   
   
3. Use the definitions above in order to determine the options that you wish to change. Click on the fields in order to change the existing values.
4. When you have completed making your changes, scroll to the bottom of the page and click on SAVE or SAVE AND CLOSE to save your entries.