When I look at pictures of items for patterns that say knit with two strands, I don't see any stripes or designs or anything that shows why or how the two strands are used. Do I just make all stitches with both strands of yarn at the same time, or is this part of that "carry it up the side" thing? The patterns never say change yarn or give any indication what I am to do with the two strands. The patterns I've read look just like patterns using one strands. The one thing I have noticed, though, it that the patterns usually say "Quick to knit with two strands." I keep avoiding trying these because I don't understand.
You can tell I am a rank beginner, and I don't know anyone who knits.