How to create a clipping mask using a png file...

Here are the steps which I did to select only inside dragon. There are and other ways, this is quick and working way:

• Create layer beneath layer with dragon and fill it with white
• Select layer with dragon then press Ctrl + Shift + Alt + E what will create merged layer on top.
• Use Magic Wand tool to select areas which you want to paint in. Hold down Shift while adding to selection.
• Trash top most merged layer and bottom most filled with white. Paint on new layer or on layer with dragon while selection is active what will restrict painting. You can also save selection just in case using Select > Save Selection.

Create a new layer above your demon. Hold down option (alt on win) and have between the 2 layers (where I drew red circle). When the cursor changes, click to clip the top layer to the one underneath.

https://helpx.adobe.com/photoshop-elements/using/clipping-masks.html

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Hi Rich,

Thanks for reaching out to us, as you want to paint inside the png, you can simply create a layer beaneath the png layer and start painting on it with the Brush Tool.

Regards,
Sahil