# Edit a sharing

Existing syncs can be **edited after the fact** — no more ending and recreating. Open the **three-dot menu** of the sharing in the dashboard and choose **"Edit"**.

## What you can change

| Setting | Description |
| --- | --- |
| **Source calendars** | Add or remove calendars. New sources are fully backfilled (including existing events); removed sources automatically clean up their copies in the target calendar. |
| **Target calendar** | For your own syncs, switch the target calendar. The copies are removed from the old target and transferred to the new calendar. |
| **Visibility** | Switch between "Busy only", "Title + time" and "All details" — see [Visibility levels](https://docs.kalender-sync.de/en/sync/visibility-levels/). |
| **Placeholder title** | Change the text shown instead of "Blocked" with "Busy only" — see [Placeholder title](https://docs.kalender-sync.de/en/sync/placeholder-title/). |
| **Prefix** | Set, change or remove a title prefix per source calendar — see [Prefix in the target calendar](https://docs.kalender-sync.de/en/sync/source-prefix/). |
| **All-day events** | Under "Advanced settings": whether all-day events block the day — see [All-day events](https://docs.kalender-sync.de/en/sync/all-day-events/). |

The **sync preview** on the right of the dialog shows live how events will look in the target calendar with the new settings.

## What happens after saving

After saving, the sharing briefly shows **"Updating…"**: Kalender-Sync rewrites all already-synced copies in the background with the new settings. Depending on calendar size this takes a few seconds to a few minutes — nothing else to do on your side.

- Your **original events always stay untouched** — only the synced copies in the target calendar are adjusted.
- If you switch to a **stricter visibility** (e.g. from "All details" to "Busy only"), older copies outside the [sync window](https://docs.kalender-sync.de/en/sync/sync-window/) are removed as well, so nowhere shows more detail than intended.
- During a **target calendar switch** the sharing is briefly paused while the copies move, and resumes automatically.

## Special cases

- **Two-way sync**: visibility, placeholder, prefix and the all-day option can be set **per direction**. The two calendars themselves are fixed for two-way syncs — end and recreate for that.
- **Sharings with other people**: you can edit the sources and all rendering options; the target calendar belongs to the recipient and stays fixed.
- **Unreachable source calendars** (e.g. deleted at the provider) appear in the list marked "unavailable" and can be unchecked — swap a dead source for a new one without losing the sync.