Merge with operation plus

I'd like to use the merge with plus, attached is an image of the operations in the Nuke merge, I need the plus in Fusion merge, but I can't find it under apply mode. I've tried different modes but I don't get the result of a Nuke plus. Am I doing something wrong? or is it not there?
I also need the minus operation. Any help is appreciated. Thanks.

Forget it, I've done it with custom tool, but it would be nice to have it on the drop down list.