Transparency issue

I am learning DR after years of working with Adobe Premiere Pro and am unable to figure out how to set the transparency when keying out a green screen. The green screen is behind a white table and I want to key out the green screen but leave the white table opaque. I can get the green screen keyed out using the Delta Keyer but that leaves the white table slightly transparent. In PPRO there is a transparency adjustment that takes care of this. Is this in DR and I just can't find it or is there another way to do it? I have tried using the Chroma Keyer but there are many shades of green and it will take too long to key them all out. Any guidance will be appreciated very much!!

My apologies!! I neglected to mention that I was doing this in Fusion and used the CleanPlate tool. Now I’m wondering if the CleanPlate tool is appropriate for this.

In case anyone else has this problem I thought I would report the solution. I found the Threshold control on the MATTE tab of the DeltaKeyer. Changing the "LOW" to 0.722 and the "HIGH" to 0.917 solved my problem. I'm sure different values will be needed for other clips.