You can perform manual syncs whenever you want—regardless of whether autosync is enabled.
1. On the Home screen, press the Menu key and tap Settings.
2. On the Settings screen, tap Accounts and Sync.
3. On the Accounts and Sync screen, choose one of the options in steps 4–6 to perform a manual sync.
4. To simultaneously sync all listed accounts (equivalent to performing a one-time autosync), tap the Sync All button at the bottom of the screen. This is the equivalent of performing an autosync, updating all accounts immediately. ...