1. Open Export Data
2. Select one TIFF and choose output file location / name.
3. Click OK.
4. Select your output options and then click on Batch
5. Change the Variables to One or more inputs, one output and then click on add files:
6. Select the rest of your tiffs and click OK:
7. You can now click Run Now, but if you want to make use of addition cores for processing, click on Submit and choose the appropriate number of simultaneous processes.
8. Click OK.