Drag atom — click and drag any atom to reposition it (bonds follow)
Pan canvas — click and drag on empty space to scroll the view
Place atoms — select element, click canvas
Toggle bond — click any placed atom to instantly start bonding from it
Draw bond — in Bond mode click atom → atom
Delete — Delete mode → click atom or bond
Align ⊞ — auto-arranges atoms neatly
Fit ⤢ — zooms to fit your structure
+ / − — zoom in / out
Auto-check — validates as you build ✓