I'm new to Lightroom but have just spent a day importing my library. I am saving to a NAS drive. I have keyworded and used face detect on all items and they appear correctly in the keyword panel. I am assuming that as I do this the keyword is written to the asset. However it appears the asset filedate remains its original created date and on viewing properties the keywords do not appear. If I export a group of images however the keywords do appear. I am obviously missing a vital final stage, sure its a basic thing. Thanks in advance.