SPSS: how to convert from wide to long data format for repeated measures designs

In my very first screencast ever I'll illustrate how to to convert (aka restructure/rearrange) SPSS data that's in the "wide" format to the "long" format when you have a 3x3 within-subject (repeated measures) design. While the wide format (i.e., one line per participant) is needed for running repeated-measures ANOVAs etc. (here: a 2-way 3x3 ANOVA), the long format is a lot more flexible and allows you, e.g., to use SPSS's Chart Builder to produce line charts that include error bars - which the normal ANOVA plot that SPSS offers doesn't include for, well, no good reason.