Anyway, for further reference, here's how to do a kitchener stitch:
- setup: front purl, back knit.
- front needle: knit-slip and purl-leave
- back needle: purl-slip and knit-leave
Further info on grafting can be found here. Especially, grafting garter stitch is explained like this:
- setup: Front purl, back purl.
- front needle: knit slip, purl.
- back needle: knit slip, purl.