# From the Plan to the Field: Basic Layout
**Layout** is where the plan becomes real — you transfer the drawing's dimensions onto the actual floor, wall, or material.
## Do it accurately
- **Work from one reference point.** Pull every measurement from the **same starting edge or control line** — don't "stack" lots of little measurements end to end, because small errors add up.
- **Mark clearly** with a pencil and a square so your lines are crisp and at the right angle.
- **Snap chalk lines** for long, straight runs.
## On-center spacing
Framing is laid out **on center (O.C.)** — measured to the **center** of each stud or joist, commonly **16" or 24" O.C.** Use the highlighted marks on your tape to step off the spacing.
## Check yourself
Use **3‑4‑5** to keep corners square and verify with diagonals before you build on the layout.
**Takeaway:** Lay out from one reference point, mark on-center spacing, snap your lines, and check square — layout is the plan made real.
> *Educational overview — practice with a real plan set. The more drawings you read, the faster it clicks.*
