Hello rampsr
This feature is added from CW10.3, please see the release note of this update.
To make this option available, please install the update 1.0.0 on your CW10.3. Or upgrade to CW10.6.4:
http://tinyurl.com/6jo5tge
I tested on CW10.6.4, and it also includes this feature, please see the screenshot in below:

Best Regards
Fiona Kuang
Technical Information & Commercial Support
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