The quick mask continued...

Click on the paintbrush tool... (if it is currently showing a pencil instead of a paintbrush, hold your mouse button on the pencil and select the paintbrush from the pop out menu). As a default in the mask mode, the colour boxes, should come up with black and white. The topmost colour in the overlap is the activated colour.

Now go into the image and paint with the black colour onto areas that need to be masked out in the background.

There will be untidy areas in your selection that will need cleaning up (ie, note where the mask overlaps Daisy's tail in the image above or the mess on Daisy's arm below). Make white the active colour by clicking on it so that it comes to the foreground, make sure that you have a soft edged brush (see the brush dropdown menu at the top) and paint carefully over the mask to remove areas where it overlaps your image.

The mask is temporarily added to the channels palette and can be viewed in there (see box marked above).

Once you are satisfied that the image is masked as you'd like it to be, select the button to the left of the mask button on the tool bar. The tinted red mask will disappear and you will be left with a clean selection around Daisy.

The End