Tools/materials: Dell cassette G 15, windows 10, Adobe Photoshop CC2 1.32.
1, select free conversion.
Open the Edit menu and click Free Transform. The shortcut key is ctrl+T.
2. Select the anchor point to drag.
There will be multiple anchor points around the picture. Select any anchor point to drag.
3. Modify the picture size
Drag inward to reduce the picture, and vice versa.