In the left portion of the window the companies that have been installed in your MONITOR system will be displayed. The companies are displayed in a hierarchical structure in the same manner as in the Change to company... window under File in the Window menu. In the right portion of the window under the Tables heading, you will find the alternatives for the tables that should be created when you initiate the new historical register.
Once you have selected the company to synchronize against in the left portion, you choose whether to add one particular table or all tables. During the very first synchronization, you should include All the tables (the All option under Tables). Use the Save button in the Window functions to start the synchronization.