ER Diagram Design Options

Option A — Blueprint Tables

Header band, gridlines, PK/FK pills, type column
CUSTOMER PK id string name string ORDER PK id string FK customer_id string created_at date places

Option B — Ledger Rows

Sidebar title strip, zebra rows, icon markers
CUSTOMER id name string string ORDER id customer_id created_at string string date places

Option C — Minimal Ink

No gridlines, typographic hierarchy, bold relationships
CUSTOMER id PK string name string ORDER id PK string customer_id FK string created_at date places