The numbers in the corner are from the program Height - seems you useone of my backups
The can be removed by deleting the file ttn in the rrot of your device and deleting the folder height.
If you want to keep the altimeter you can use the config file file in the folder height to adjust where the numbers should be displayed and by entering the number you see in day and nicht mode in the config file after "d=xxxx" and "n=xxxx" you get correct readings.
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