Open a SKU from the index. Tabs here are variants of that SKU only — a rebuild is a draft until you Save.
Inches in, millimetres on the STEP. Rebuild writes a draft of this variant. Save is the only action that moves the version other people open. STEP is manufacturing truth and is not offered on a draft.
Recorded in Postgres against this revision (who, when, rev) — not a label in the browser. Without Google sign-in the identity is the name you type. Signed-in accounts will replace that automatically later.