The connect dialog can be opened by selecting the Database -> Connect
menu item or clicking on the connect icon
from the toolbar menu.
To connect to a particular database, you will need to define it's connection information in the Edit Connections dialog. You will also need to load all the database drivers for that database using the Load Drivers dialog. After doing that, you can try to connect to the database by selecting the connect button.
If the connection
could not be established for some reason, an error message will be displayed
to the user with the details of the error.