I couldn't translate the middle left vertical sentence on the first diagram because it's a bit too faded. (It said something about the corner...) There's also

I couldn't translate the middle left vertical sentence on the first diagram because it's a bit too faded. (It said something about the corner...) There's also references about 'this layer/level' all over the place that make me think there may be some paper folding involve but it could simply mean 'this layer is solid yellow' and so on.