To create an ST Parquet launch button in the 3ds Max toolbar, follow these steps:

1. 1. Navigate to Customize > Customize User Interface... to open the dialog.
   2. In the dialog, select the Toolbars tab.
   3. Find the Category dropdown and choose Siger Studio.
   4. Locate the button reference for ST Parquet (STPP) within this category.
   5. Drag the button to an existing toolbar or create a new one for your custom tools.
   6. Once the button is placed, you can save your 3ds Max UI changes for future use.