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Not really but I'm also not sure it is really what you should be doing (and it's certainly is most likely not the right thing to do).
ExpoDev's calculated EFS is based on real-world film test data. That data is the authoritative source for your exposures. You should not be fiddling with that to adjust exposures as it will have all sorts of consequences, like throwing off your development times and reciprocity adjustments. It's a close-loop system.
For filter factors, you should use ExpoDev's actual filter factors feature. If you want to use different filter factors for the same filter under different situations, just create additional filters in ExpoDev for each of those situations. For instance, you can keep the standard "Yellow 8" filter with a factor of 2x and create a "Yellow 8 for Death Valley" that uses a different factor, any factor value you want. You can create as many of these filter/factor combinations as you need.
This has two advantages: One, you get better record keeping that models your intent and two, it lets ExpoDev do the right thing.
Here's another ExpoDev filter tip: I often create filters with a factor of 1. Why? Well, it lets me do unorthodox things like metering through my filters with my modified Zone VI spot meter (it's never done me wrong, YMMV). But since I still have those filters names in ExpoDev with a factor of 1, I can select them during my exposures and while they don't modify the exposure, they get saved with the record as documentation of what I did.
If this doesn't suit your needs they there is always the ability to manually adjust the exposure (in stops) but that is more akin to guessing...
David
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