1. Open the Tik Tok app and click the "Shoot" button below to enter the shooting page.

2. Switch to the "Special Effects" function, which can be found in the navigation bar at the bottom of the screen.

On the special effects page, you can see some special effects of eyes, mouth or face. Clicking a special effect will have a dynamic effect, and you can adjust the size and position of the special effect through the tips on the screen. If you want to see more special effects, you can choose the "More" option at the bottom of the page.

4. After selecting the special effects, click the record button, hold down the middle button, turn the mobile phone, and record the video with the special effects.

5. After recording, you can cut, add filters or other editing operations on the editing page. After editing, you can save or upload the video to Tik Tok.