#The key for switching between upper and lower case on Apple notebook is: caps lock key. To switch between uppercase and lowercase under the Apple system, you only need to press the "caps lock" key in the English input state to lock it into uppercase state. If you do not lock the "caps lock" key, it will be in lowercase state.
We can also define our own keyboard to switch between upper and lower case:
1. Open the keyboard in preferences and click the modifier key in the lower right corner directly.
#2. After we click the modifier key in the lower right corner, click [caps lock] to set the caps lock key in the first row to no operation.
3. Click [fn] on the last line, then select [Lock Caps], click OK, and then press [fn], then it will switch to uppercase. .
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