1. Open Adobe Photoshop CC, click "File" to open the photos that need retouching from the folder, and try to select the pictures with fewer objects in the background.
2. In the operation panel on the right side of PS, double-click the layer to unlock, and then click OK. You can edit the picture freely after unlocking.
3. Find and click the "Filter" button in the toolbar, select the "Liquefaction" tool, and enter the liquefaction editing window (you can also directly operate it with shortcut keys: Shift+Ctrl+X).
4. The Forward Deformation Tool is mainly used in Liquefaction, which is the first button in the Liquefaction window.
5. Adjust the parameters before operation, slide the slider in the tool options, and adjust the brush size and brush pressure.
5. Squeeze/stretch the facial contour of the character and squeeze inward in the direction of the arrow.
6. After the operation is completed, click OK to complete the change of fat and thin figure. See the comparison chart below.