trying to change arrival runway on FMC (739)

[razorseal 0]

I go into legs, then last wp which is the runway, and it currently says RW24L... I was just told to land at 6L... well when I input 6L, it says not in database... I also tried RW6L with no luck either...how am I supposed to change the arrival runway?thx!

[Guest kriss737]

Select DEP/ARR page select ARR, select LS next to the selected RW this will de-select it. Select new runway..Chris