# History and Compare

Every command written to a schedule is logged. The **History** tab replays it as readable sentences; **Compare** shows what changed between two moments.

## History

In the right-hand panel, the **History** tab lists the most recent entries first, each one dated ("Sep 26, 3:07 PM"), attributed ("You", another member, or "Deleted user" for an erased account), and described in one sentence — "Edit the legend", "Action 'Order the concrete' on 'Foundations': completed. (2 commands)", "Block 'Earthworks' (row 1.1 'Earthworks') added: 2026-10-05, 5 working days. (10 commands)"…

Two menus filter the list: **who** (Everyone, me, or a named member) and **when** (Whole period, Today, This week, Two dates).

## Compare

The **Compare** button, at the top of the same tab, opens two dropdown menus — a starting point ("since Monday (rank 0)", or any earlier dated and attributed rank) and an end point ("now", by default). Choosing a start immediately shows, under the menus, a summary ("from rank 0 to rank 40: 20 additions, 11 changes") then the detailed list of differences: rows added or removed, blocks added (highlighted), moved, resized, recolored, links created, cells changed, comments — each line in the same readable sentence style as History. **Close the comparison** goes back to the plain list.

## What happens when you get it wrong

- **Nothing you do in History or Compare changes the schedule**: these are read-only views; looking at an old rank, or comparing two moments, doesn't restore anything by itself.
- **To actually go back to an earlier state**, it's **Versions** you need to open, not History — see *[Versions and the trash](/docs/en/guides/versions-et-corbeille/)*.

## What this page doesn't cover

- **Actually restoring an earlier state**: see *[Versions and the trash](/docs/en/guides/versions-et-corbeille/)*.
- **Reading the same log from an agent** (`get_history`, `diff_versions`): see the agent guide.