Where can I find which TWS Build I am using?

You can monitor your margin values in real time using your TWS Account Window by looking at the Margin Requirements and Available for Trading sections:

• In Mosaic, click the Account menu option followed by Account Window
• In Classic TWS…

First, create your new watchlist with your desired symbols and call it TEST 1. Next, create a new layout from the Global Configuration page. To access Global Configuration in Classic TWS, click the Edit menu option followed by Global Configuration. In Mosaic, click the File menu option followed by Global Configuration. …

If you would like to close Mosaic but not shut down Trader Workstation, you can either toggle to Classic TWS or close down the Mosaic tab all together. 

To toggle to Classic TWS, look for the Classic TWS button in the bottom left corner of TWS. Simply left click it to switch over to the Classic TWS layout. …

To preview the margin impact of closing a position in Trader Workstation (TWS) or Mosaic, follow these steps:

1. Right-click on any data line with a position in your TWS/Mosaic interface.
2. Navigate to "Contract Info" in the context menu that appears…