I am using Samsung Galaxy tab S7 plus. There should be on screen control panel for customise the brightness and volume like edge panel. because it's easy to customise volume brightness and other display settings If it is on screen. being the medical...
every tab has same thing bro. it doesn't work in our tab. the feature you are talking about it work in windows PcS and laptops , samsung does't provide kinda feature in any neither TAB mode nor DEX mode sadly.