Navigate the system using the three headings Data, Network and Analysis at the bottom left of the screen. Each of these headings refers to a different section of the system.
Click on one of the headings to open the menu for that section. For example clicking on Network will change the menu to list the categories in the Network section.
Expand a category by clicking on the folder that you wish to work in, for example Sales Order Processing.
This will now open the sub categories. Click on a menu item to choose what you want to do on the system, opening the list of sales order for example. Using the search function if needed, find the record you require on the list, and double click to open it.
Click on the >> on the sidebar and the menu will expand for further selection, on the << and it will collapse: