> For the complete documentation index, see [llms.txt](https://docs.theconfigteam.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.theconfigteam.com/prebilt-for-pm/applications/offline-synchronisation/user-guide.md).

# User guide

{% hint style="info" %}
**Note**

This user guide refers to PreBilt transactions beginning '*PB2\_*' and details the standard process without additional features or enhancements. You should [copy these transactions](https://app.gitbook.com/o/iqeGPIEgOIECHrn1LHgk/s/2CkvzIq48sLzTY4bfcWl/configuration-guide/transaction-codes#create-a-transaction) with a different prefix to maintain a backup and protect the originals.
{% endhint %}

This section covers transactions *PB2\_PM\_OL\_SYNC*.

![](https://docs.theconfigteam.com/~gitbook/image?url=https%3A%2F%2F4155246504-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252F6fX0rx6AelzM2tswgmNc%252Fuploads%252FnFNRUKFySxsYsbUlhqFu%252Fimage.png%3Falt%3Dmedia%26token%3D19a07217-a8cc-4c32-81a4-5a84684edede\&width=768\&dpr=3\&quality=100\&sign=ec9cdb0c\&sv=2)

The Synchronise app displays a lists via the icons at the top of the screen.

* Tap **'Check-out'** to view the transactional and master data to be checked out for use in offline mode. Select the relevant items and tap the 'Check-out' button on the bottom right corner of the screen.
  * Where ticked item refers to 'Master Data' element, additional tab icon will be displayed in the top bar. A user can select the relevant tab for selected master data download and define data parameters for what data a user wants to synchronise for offline use.
* Tap **'Check-in'** to view documents to be checked in when back in online mode. Within the Check-in tab, you can:
  * Select pending items to be checked in the **'To Send'** tab. When selected, tap **'Check-in'** to start the checking in process.
  * From the kebab menu at the bottom of the screen, you can delete items before syncing or view further details.
  * Progress can be viewed in the **'Sent'** tab. Where an error has occurred during the synchronisation back to SAP, relevant status message will appear and a user can click on the item to check for more detailed information to help troubleshoot any issues.

In the **'Settings'** tab, you can toggle between offline and online mode.