I've only ever used Layout Adjustment when I changed the page and/or margin sizes, and it always worked as expected (as long as I didn't goof up anything in the set-up). But I've never invoked it for general purposes, during layout, if I wasn't actually changing something IN the layout. But, since you say it should be checked on to allow the MP text frame to take effect on the doc page, I just saved my document to a test file and turned on Layout Adjustment, via File>Document Setup. I didn't change any of the measurements but just OK'd all the way through. I assume it is implemented. Then, in my doc, I tried applying the page-sink MP to various pages in the doc. No change. I can create the page sink by applying a text frame object style I set up. But I can't accomplish it by applying the MP. It's not that big a deal except that it is an extra step (not much of one, but still ...) because, even using the object style, I still have to apply the MP to remove the header and apply other chapter-start-page details I may have created. So it would be nice if the page sink worked from the MP, at the same time as everything else on the master -- because everything else on the master DOES happen! -- and then I wouldn't have to take both steps -- and sometimes three steps, actually, if I forget to apply the MP *first*. I get in a hurry sometimes and go ahead and apply the object style before I remember to apply the MP. Then, when I apply the MP, the object style is lot, and there is my third step I have to take. Again, I've never applied Layout Adjustment unless I wanted to change shape/size/margins, etc. I am willing to try it (perhaps I have not yet implemented it correctly; is there a better way to implement it as a general setting than by going through Document Setup?). But, honestly, the whole theory doesn't make sense to me. Other features of the page-sink master take effect when I apply it. It's just the page sink that does not occur. I can't see how Layout Adjustment would matter in this case, especially when this is the only feature of the master page that is not applying. The mystery continues ...
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