So, this is the second masking trick I want to show you guys. Compare to masking with paintbrush technique, quick mask is more easier. However I only use quick mask if my selection area is geometry and static. If I want to display more dynamic or artsy area I usually use paintbrush. A good example is to create photo frame effect with quick mask on gimp.
Open a new image file, again I have my nephew here :). First create a selection area you want to show. You can use any type of selection tool you want. This time I choose rectangle selection.
Beside selections tool, gimp toolbox section have feature that very useful for user. In this post, we will talk about color picker, measure, and moving. Before we get into the topic, please check out this 2 article about selection in gimp that I published before: