How can I search app button and return back to previous apps button in Galaxy A8+ 2018?

Galaxy A8+ 2018 applied new Home screen concept of clean home layout with simple widget and fewer icons, convenient home/app tray transfer by swiping. Without using the Apps button, you can open the Apps screen by swiping upwards or downwards on the Home screen.

To return to the Home screen, Swipe Upwards or Downwards on the Apps screen. Alternatively, Tap the Home button or the Back button.

 If you want to open the Apps screen using the Apps button, these are the following steps required:

Navigate to Home screen → Tap and hold an empty area → Tap Home screen settings → Tap Apps button → Select ‘Show Apps Button’ and Tap APPLY

Pictorial representation of the above settings are as follows : 

1. On the Home screen, Tap and Hold an Empty Area, or pinch your fingers together to access the editing options

2. Tap Home Screen Settings

3. Tap Apps Button

4. Select ‘Show Apps button’ and Tap Apply