1. Log in to the straight flush account and open the futures trading page.

2. Select Futures in the menu bar at the top of the page, and then select Futures Management.

3. On the futures management page, click "Add Futures" and enter the futures code and name you want to add.

4. Click "OK" to save the settings, and you can see the new futures varieties on the futures trading page.

The above are the basic steps of adding other futures to a straight flush, and the specific operation may be slightly different due to the differences of versions or platforms.

Adding other futures products can make it easier for you to trade futures and expand your investment scope. By adding other futures to the straight flush, you can have a more comprehensive understanding of the market and make more diversified investment choices according to your investment strategy and risk preference. At the same time, the flush also provides a wealth of futures trading tools and analysis functions to help you better grasp market opportunities and control risks.

It should be noted that adding other futures varieties does not mean that you can get more benefits. Investors should make reasonable investment decisions and control risks according to their actual situation and investment objectives.