Treble Crochet (TR)
Treble Crochet is one of the basic stitches in crochet. Though it is less common than Single, Halfdouble and Double Crochet. This could be based upon the fact it is taller than all and mainly used for lace projects.
Sometimes especially when you’re working with bulky yarn or a larger than usual hook, the turning chain on a treble crochet row leaves a gap at the beginning of the row. To get a neater edge, try chaining 3 instead of 4 stitches for the turning chain. I often chain 3 for the turning chain and then not count it as a stitch. I will then work my first treble crochet in the first stitch of a row. I find that this way diminishes the gap and still gives me a straight edge.