I am really new to lightroom so i´m sorry if i´m missing something very obvious...
I cannot find the way to save the keywords i have assigned to a set of photos in LR to reflect in the actual file. When i see any of the files in Windows Explorer the tags attribute is blank, yet in lightroom i can see the tags perfectly. If i go trough each photo and in the metadata section i click the button next to metadata status then it applies it, but doing this for each file is largely impractical, and pressing the button for a selection of files does nothing.