erasing paintbrush strokes

[Laco]

I can't seem to find a way to use the eraser tool just to erase brush strokes. I can only seem to get the eraser tool to act upon the entire image, erasing to the background, instead of erasing only the paintbrush strokes.

I will better explain with a simple example. Say I have a simple single layer file with a photograph of a person. I use the paintbrush tool to draw a hat on the person. Maybe I don't like what I drew with the paintbrush so I want to erase it, or part of it. I switch to the eraser tool, but instead of only erasing the hat that I drew with the paintbrush it erases the top part of the head also, exposing the blank background. How do I erase just the hat drawn with the paintbrush and not the entire image?

(Hopefully there is a method that works whilst still working on a single layer. I am not experienced enough at the moment to work with layers.)

Any advice would be greatly appreciated.

[denzjos]

You have to use a new transparent layer and draw the hat on this new layer. Click on the '+ on white rectangle' icon (see red circled icon) and select 'transparent'. You now can use this transparent layer to draw on and erase things. If you want to draw other things you can draw on this new layer or make a new transparent layer.
   

[Laco]

Much appreciated, Denzjos. You made the process, that to me seemed complicated, very simple.

Thank you