Thanks, Bob, for that information. Unfortunately, I'm working on an 8000A and the DEPTH option is grayed out.

If you're using DME channels tied to keyers on a 1-to-1 basis, then you are limited to 2 DME paths per M/E. Using the combiner, then you can put up to 4 DME channels onto one keyer. To do a 3-box effect, there's no reason that you can't use the 1 keyer like you're doing - except that if they're internal channels then the same hole-cutter will go to all combined channels (unless you turn off the keyer in the other 2 channels or clip them out to be full-screen). You can do a couple of things to affect the blow-outs: (A) Have a different DME effect for each box that you want to blow out with the priority changing based on which box does the blow (Maybe 1 effect to set up the 3 boxes, then 3 other effects to blow out the box you want). (B) Have 1 effect that has the following keyframes - 1. All 3 boxes / 2. Box 1 blow out / 3. All 3 boxes / 4. Box 2 blow out / 5. All 3 boxes / 6. Box 3 blow out / 7. All 3 boxes Build this effect using S-Linear moves & LOC XYZ (not LOC SIZE) and put the combiner in DEPTH mode. In this way, whichever box comes forward will automatically have priority. I'd put pauses on all KF's except #1. Then I'd recall the effect to get the 3-box set up. Hitting RUN will bring the 1st box full, and RUN again will get you back to the 3-box. I'd also build 3 macros...each macro would do a GOTO KF 1 or 3 or 5 & then hit RUN. In this way one effect can be used to set up your 3-box, and bring any box forward. The DEPTH mode will solve your priority issues & you'd be able to jump back & forth between boxes all day long with just 1 effect.