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# Responding to messages about the number of sync changes

When you sync your computers and devices, a window may appear before any changes are made to let you confirm whether you want to proceed. The Data Change Alert window tells you how many pieces of information will be added, deleted, or changed on your computer.

You can continue or cancel the syncin the Data Change Alert window. You can also change when the window appears, or prevent it from appearing.

## To use the Data Change Alert window:

- If you’re sure you want to continue with the sync, click Proceed. If you’re not sure, you can click Cancel.

- To choose when the Data Change Alert window appears, choose iSync > Preferences, make sure the “Show Data Change Alert when” checkbox is selected, and then choose an option from the pop-up menu.

- To prevent the Data Change Alert window from appearing, choose iSync > Preferences, and then deselect the “Show Data Change Alert when” checkbox.

You may see more than one window depending on what information is being synced and the current settings in iSync Preferences. When you click Proceed or Cancel in a Data Change Alert window, your response affects only the information described in that window.