Step 3:
We begin by opening the file "Console.png" in Slicer mode.

The first thing we need to do is draw slice lines like the example shown here. The easiest way to do this is to use the Draw Line tool (the fountain pen with the squiggly line underneath it).

We draw lines across and down the image until we've made the sections shown at left.

You may need to erase some segments of line to make it look like this. If so, the Erase Line tool (the white eraser) takes care of this.