The key operation of electric pressure cooker varies according to different brands and models. Generally speaking, the instruction manual of electric pressure cooker will explain the function and usage of each key in detail. In most electric pressure cookers, the operation of stewing meat is often realized by selecting the function keys such as "stewing" or "meat". Specifically, depending on different brands and models, there may be the following common key options:

1. "Stew" button: This button is usually used for stewing food materials, including stew. After pressing the stewing button, the electric pressure cooker will automatically set the appropriate stewing time and pressure.

2. "Meat" key: Some electric pressure cookers will specially design a "meat" function key, through which you can select and set the time and pressure of stew.

3. "Manual/Custom" button: In some electric pressure cookers, there may be no special stew button or meat button, but manual or custom functions are provided. With this button, you can set your own time and pressure for stewing geese according to your recipes or personal needs.

It should be noted that the key layout and function distinction of different brands and models of electric pressure cookers may be different. Therefore, it is recommended that you refer to the corresponding user manual or brand official website for specific key operation methods.