Provisional Cast-On
Provisional cast-on is a temporary cast-on that can later be unpicked, freeing live stitches to be knitted in the opposite direction.
Explanation
A provisional cast-on is worked with waste yarn or a crochet chain so the cast-on edge can later be removed, 'waking up' the original stitches as live stitches on the needle. This is used whenever you need to knit in the opposite direction later, such as for Italian bind-off, seamless joins, or picking up stitches along an edge without a visible cast-on ridge. Common methods include a crochet chain provisional cast-on or casting on over a strand of waste yarn.