Canon EOS R50 Mirrorless Camera (White) - Manual (Page 461)

3.
Press the < > button and select Flexible Zone AF 1, 2, or 3.
4.
Press the < > button.
5.
Adjust the Zone AF frame size.
Use the < > keys to adjust the Zone AF frame size, then press the
< > button.
To restore the default setting, press the < > button.
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