Probing In Simple Steps
From EVE University Wiki
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.