There probably are Youtube videos but this is the way I have been working it if you prefer a text guide. Hope it helps.   1. Open the scanner, No3 button. 2. Press Tab and click the graph in the middle of the screen. 3. Leave whatever ore you want highlighted at the bottom. 4. Press tab again once your done. 5. Run around until you pick up a signal on the graph(line with a dot), if the dot moves further away on the right of the graph go the other way. 6. Once it stops moving