Press Settings.

Press General.

Press Accessibility.

Press 3D Touch.

Press the indicator next to "3D Touch" to turn on the function.

Press and drag the indicator below "3D TOUCH SENSITIVITY" right or left to set the required sensitivity for 3D Touch.

Slide your finger upwards starting from the bottom of the screen to return to the home screen.

Hard press and hold the required app until a pop-up menu is displayed.

Press the required function and follow the instructions on the screen to use the selected function.

Press Photos and go to the required folder.

Hard press and hold the required picture until a pop-up menu is displayed.

Drag the picture upwards.

Press the required function and follow the instructions on the screen to use the selected function.

Press the music player icon and go to the required audio file.

Hard press and hold the required audio file until a pop-up menu is displayed.

Press the required function and follow the instructions on the screen to use the selected function.

Press the message icon.

Go to the required message.

Hard press the screen to see a section of the required content.

Press the screen a little harder until the content of the message is opened in the relevant application.

Slide your finger downwards starting from the top right side of the screen.

Hard press and hold the required function until a pop-up menu is displayed.

Press the required function and follow the instructions on the screen to use the selected function.