The virtual home button on S7, S7 Edge allows you to turn off the screen without using the power button, configure screen lock, standby screen, camera settings... reducing the wear on physical buttons.

You can proactively enable the virtual home button on S7, S7 Edge by following these instructions:
Step 1: Navigate to the Settings
section from the Main Screen Menu.

Step 2: Choose the Accessibility option.

Step 3: Select Dexterity and Interaction to activate the Accessibility Menu on Samsung.

Step 4: Next, choose Assistant Menu from the options.

Step 5: Enable the virtual home button feature in the Assistant Menu.

That completes the guide on activating the virtual home button on Samsung S7, S7 Edge. Wishing you success.