To make it easier for new players to learn how to probe, I've decided to create this little picture guide on how to set up a series of probes to scan down targets.
Four Probe Setup
1. Deploy two probes. File:P4-1.jpg
2. CTRL+SHIFT+Drag them downward.
File:P4-2.jpg
3. Deploy two probes.
File:P4-3.jpg
4. Drag the first two outward to form a triangle
File:P4-4.jpg
5. Drag the third probe to center of the triangle.
File:P4-5.jpg
6. Drag the center probe vertically.
7. Expand the resolution to fit.
File:P4-7.png
8. Drag the probes in/out, and expand/contract the resolution as needed, CTRL+SHIFT to move the entire group at once.