If you have to increase at the edge, like on a sleeve, you just k in the front and back of the edge stitch, and then incorporate it into the ribbing sequence on the next row.
If you're increasing in the final row before starting stockinette, then it really doesn't matter. You can just increase evenly across.
If you're trying to increase in the middle of ribbing, and keep on ribbing, there's really no invisible way to do it.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry