Displaying app keys on the screen makes it easy for you to access the interface and use other applications.
Here's how to display app keys on the Samsung Galaxy J3 Pro:
Step 1: Go to 'Settings' and select 'Display.'

Select 'Display.'
Step 2: Select 'Screen Timeout.'

Select 'Screen Timeout.'
Step 3: Select 'App Keys.'

Select 'App Keys.'
Step 4: Select 'Display App Keys.'

Select 'Display App Keys.'
That completes your setup process, wishing you success.
