What if the old machine doesn't have a menu button?

The old man-machine has no menu key. The solution is as follows:

1. Use shortcut keys: Most mobile phones support opening menus by shortcut keys. Press and hold the phone power button, and then select options such as menu or settings to open the menu.

2. Use Jiugongge function: Some old machines have Jiugongge function and no menu keys. You can open the menu by entering text in the input box, then holding down the "123" key, and then sliding up and down.

3. Use accessibility features: Some old computers support accessibility features, such as enlarging or reducing the screen and changing the font size. You can open the menu through accessibility features.