It is quite easy to edit a PSD file in free online photoshop. Here the difficulty of editing depends on the demo/previous PSD file.
However, let’s assume you are going to edit a book cover PSD file. Here for this, I am going to show you the steps. Following the steps, you will be able to edit it.
2. Then if you want to edit a completely new file then click on the PSD template. However, as you are going to edit a PSD file, you have to open the file.
To do so, click File from the top menu bar. Then click open and select the File you want to edit and open the PSD file online.
3. Now the book cover will appear and you can edit it from the Layer option on the right side.
4. There you will find different options such as title, subtitle, author name, background, etc. Just click on any elements and there you can edit the element specifically from the Layer.
5. Finally, when you are done with editing you can save it as a PSD file from file. If you want to save it in a different format then click File and click export as. Here you will find different options such as PNG, JPG, GIF, etc.
Click the desired format you want to save and other options will appear. I would suggest keeping it default and saving it.