Step 1: Create a new layer, click "File" in the upper left corner of ps, and then create a new layer (or crtl+alt+n)
Fill in the parameters as you like, and pay attention to the selection of transparent background images.
Step 2: Open the psd file, click the "Move Tool" in the tool, and then select the "Auto Select" option above
Step 3: At this time, click on the icon in the psd file, long press the left mouse button, and drag the icon into the layer of another file (that is, the layer you created)
The effect is as follows
Step 4: Click the slice tool, select the area you want, and then press ctrl+shift+alt+s to save (this step is just a way to save the picture, in fact, there are other ways to save it)
Finally click save.
If you want to cut jpg pictures or other pictures, you can start directly from the fourth step, use the slice to select the area to be cut, and then save it.