The Designer window has four discrete areas:
This is the main area where you work on the contents of your FDs and tables. It is a tabbed area that allows you to open many FDs, tables, and settings dialogs (from the Tools menu) at once, so you can work on things concurrently.
This pane displays detailed information on elements of the catalog, such as individual data items and table definitions.
The Status pane displays an audit trail of system responses to your catalog operations. Click each of the tabs (Errors, Warnings, Info, and Time) to toggle that particular information on and off. You can also save off the current information to a text file, or clear the messages down.
Another salient section of the screen is the Current DSN indicator. Not only does it show which catalog you are currently logged on to, but it also enables you to quickly connect to other catalogs.