Back ridge Rather than working under the top loops or ‘V’ of foundation chain, turn chain upside-down, insert hook under the single strand of yarn that is bump│ridge-like in appearance, work stitch as normal.

Stacked dc (Stacked double crochet) Sc in indicated st, insert hook from front to back in leftmost back vertical bar of sc just made, pull up a loop, yo, draw through 2 loops on hook. Alternatively, replace this stitch with traditional ch 3 if desired. {See Video tutorial] 

PM (place marker) Place marker in‮”‬xaround‮”‬xthrough stitch just made or as instructed.

Color change sl st (Color change slip stitch) Insert hook into indicated stitch, drop current color, using next color in sequence, pull up a loop, draw through loop on hook.

Puff st (Puff stitch) (Yo, working around sc 2 rows below, inserting hook from front to back, pull up a loop, bring loop to height of stitches in current row) three times, yo, draw through 6 loops, yo, draw through remaining 2 loops on hook.

Join Sl st into first st of rnd; joining last st to first, completing a circle‮”‬xround.

Color change dc (Color change double crochet) Insert hook into indicated stitch, pull up a loop, yo, draw through 2 loops, drop current color, using next color in sequence, yo, draw through remaining 2 loops on hook.

Sc2tog (Single crochet 2 together) Insert hook into indicated stitch, pull up a loop, insert hook into next indicated stitch, pull up a loop, yo, draw through all 3 loops on hook; decreasing 2 single crochets, to 1.