To save a Photoshop file as a PNG, follow these steps:
1. Open the Photoshop file that you want to save as a PNG.
2. Go to the "File" menu in the top menu bar and select "Save As."
3. In the "Save As" dialog box, choose the location where you want to save the file.
4. In the "Format" dropdown menu, select "PNG."
5. Give the file a name, and then click the "Save" button.
6. In the "PNG Options" dialog box, choose the settings you want for the PNG file, such as interlacing, transparency, and quality.
7. Click "OK" to save the file as a PNG.
Your Photoshop file is now saved as a PNG file in the location you specified. The PNG file format is commonly used for web graphics and images that require transparency.