Solution:
To be able to modify this function, developer mode must be activated:
1.-Enter settings/configuration
2.-About the phone
3.-All the specifications
4.-MIUI version
5.-Press 7 times on MIUI Version (It will give us a message that developer mode has been activated)
Once developer mode is activated:
1.-Enter settings/configuration
2.-Additional settings
3.-Developer options
4.-Search DRAWING options
5.-Select the option "smaller width"
6.-Adjust according to the required width
7.-Click on Accept
Note: It is important to mention to the client that activating the developer mode outside the call is under their responsibility, since it is suggested that it only be activated with the help of a technician.