The methods of using png images as folder icons are as follows:

1. First, download and install IconWorkshop software and open it. Here, take a png image file extracted from MIUI system as an example. If you want to use png images as icons directly, the system will pop up the file without icons.

2. Turn it into an ico icon, drag the png image to be converted into the program processing box, or select "Open" in "File" in the menu bar, and then the image file will be displayed in the processing box: click the first tool button in the upper left corner of the image processing box, the purpose of this button is probably to "create a new icon with an image", check the size of the icon you want to get in the pop-up window, and then click.

3. At this time, pre-icon processing items of various sizes will be displayed in the left column in the processing box. Select the size we want. Generally, the larger the icon, the better and clearer the quality. Then click the last button in the small toolbar at the upper left of the processing box. If an incompatible prompt pops up, click OK.

4. First, save the project, which is a file with the suffix. icns. After saving, click this button again, this time to save the icon. After selecting, save the directory and name and click "OK". At this time, the whole process of converting png images into ico icon files is completed.

5. Finally, you can use this icon to replace the icon of the program or folder. Select its "Properties" and find the change icon ".Click it and browse to the location where the icon is saved. Select it and confirm.