Why is the editor read‑only on my device?
Editing requires an edit key stored in your browser. If you opened a diagram on a different device/browser, you may need to use “Claim Edit Access” and paste the edit key from the device that created it.
Backspace/Delete removed too much. How do I delete only selected nodes?
Select the node(s) you want to remove, then press Backspace/Delete. The swimlane container is protected from keyboard deletion; only selected flow/ERD nodes (and related edges) are removed.
Why don’t edges show up in exported SVG?
If you’re exporting Swimlanes, edges must render above the swimlane background. If you still don’t see edges, re-export and share the SVG file contents so we can verify paths are generated.
How do I add columns / data types in ERD?
Select an ERD Entity, then use the Properties panel: add fields, edit field name/type, and toggle PK/FK/Nullable/Unique. For FK, pick the referenced entity + PK field.
Crow’s Foot vs Chen — which should I use?
Crow’s Foot is common for database design (cardinality markers like 1..N). Chen is useful for conceptual modeling (entities/attributes/relationships). You can toggle notation in the ERD toolbar.
Can I import SQL to generate an ERD?
Yes: ERD → Import SQL. Paste PostgreSQL-style CREATE TABLE statements. The importer is best-effort and focuses on tables/columns/PK/FK. If something doesn’t parse, share the SQL snippet and we’ll harden the parser.
Can I export a PDF data dictionary?
Yes: ERD → Export PDF. Page 1 is the diagram image; following pages include a data dictionary with entities and fields.