I only ever come across this screen accidently, pressing the bottom right button resets the top black line which slowly fills it up, with the number going between 35 and 40.
Altimeter. Bottom right button changes the update interval, black line is a bar graph of readings, left side circle indicates the change since last time the bar graph part was updated.
https://www.casio.com/content/dam/casio/global/support/manuals/watches/pdf/34/3410/qw3410_EN.pdf (page E-36)
Altimeter. Bottom right button changes the update interval, black line is a bar graph of readings, left side circle indicates the change since last time the bar graph part was updated.
Oh wow, thats the first one on the 3 function button, thats embarrassing 😅