📋 How To Use This Lab
- Set Start and End for each axis (X, Y, Z) — this is exactly t[x0:x1, y0:y1, z0:z1].
- Slicer swings the blade and the matching cells glow — everything else dims out.
- The selected sub-block flies into the Extracted Slice panel, zoomed in with its own real shape.
- Try setting a Start equal to or past its End — PyTorch doesn't error, it just returns an empty tensor.
🎛️ Choose a Slice Range (per axis, size 4 each)