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Another vote for big/big method that snotty mentioned last page, specifically:
The correct way is big/big not through the derailleur plus a pair of links on top of the shortest you could make it, from there you usually add another pair for 1x and another for suspension.
I worked with a very skilled race mechanic who told me this was the standard Shimano method. Also happens to be the Sheldon Brown method IIRC.
I mean, I can't see the situation when I'd ever have the chain in the small chainring and the smallest cog, but there must be a way of having the chain length so you could if you wanted but also have it on the big ring and largest cog (which I probably wouldn't use either).