There are a few steps to make the background transparent in Photoscape. Firstly, open Photoscape and then load the image you want to create a transparent background for. Click File and then click New to create a new image file. In the pop up window choose Transparent for the background color.
Next, select the Want tool from the toolbox and use the mouse to cut out the image from the background. Press Ctrl+X to cut the image selection.
After this, click the blank, new image created with the transparent background and press CTRL+V to paste the selection.
Go to File > Save as and choose PNG and that's it.