The workspace

┌─ Menu bar (File · Edit · View · Arrange · Verify · Help) ─────┐
├─ Tab strip (one per open document, click [+] for new) ───────┤
├─ Toolbar (Draw · Align · Transform · Boolean · History) ─────┤
├───────────┬────────────────────────────────┬─────────────────┤
│ Layers    │                                │ Properties      │
│ Cells     │           Canvas               │ (selected obj)  │
│           │                                │                 │
└───────────┴────────────────────────────────┴─────────────────┘
│ x, y   │   N shapes · N refs · N selected   │ measure │ zoom │
└──────────────────────────────────────────────────────────────┘

• Menu bar (top): File / Edit / View / Arrange / Verify / Help.
• Tab strip: one tab per open file. [+] spawns a blank document; × closes. Switch tabs to edit a different document; the clipboard is shared across tabs so you can copy/paste between them.
• Toolbar: grouped into Draw, Align, Transform, Modify, Boolean, History. Each group has a small label above it.
• Left panels: layers above, cell hierarchy below.
• Canvas (center): the drawing surface.
• Right panel: editable numeric properties of whatever is selected.
• Status bar (bottom): cursor coords, counts, live measurement, zoom.