# Visibility levels For each sync you decide how much the receiving side sees of your events. This is the heart of the privacy concept: you share **availability**, not necessarily content. ## The three levels | Level | What arrives in the target | Typical use | | --- | --- | --- | | **Busy only** (default) | Just the time slot, titled "Geblockt" by default — or your own [placeholder text](https://docs.kalender-sync.de/en/sync/placeholder-title/) like "Busy" | Personal events block the work calendar — maximum privacy | | **Title + time** | Event name plus start and end time | Linking your own calendars, close team coordination | | **Full details** | Incl. location, description, notes and links | Assistants, shared schedule management | With a [two-way sync](https://docs.kalender-sync.de/en/sharings/self-sync/), you can pick the level **per direction**. ## What is never transferred Regardless of the level, these stay out: - **Attendee lists and their email addresses** — that's third-party data - **Organisers** and **accept/decline status** - Attachments More on the privacy concept: [Security & privacy overview](https://docs.kalender-sync.de/en/privacy-it/security-overview/). ## Setting and changing You pick the level **when setting up** the sync, in the "Visibility" step — and you can change it any time later via the sharing's three-dot menu → **"Edit"**. All synced copies in the target are rewritten automatically → [Edit a sharing](https://docs.kalender-sync.de/en/sync/freigabe-bearbeiten/). ## Which level for which case? - **When in doubt: "Busy only".** It serves the main purpose — no double bookings — without revealing anything. You can always upgrade later. - **"Title + time"** when the other side should know *what* blocks you (e.g. your own two calendars, or a close team). - **"Full details"** only when the receiving side needs to *work with* your events (assistant, co-founder).