adding keywords to several photos at once in the Photos app
In the past I could select multiple photos, and add one or more labels to the 'Keywords' area in the "info" window for all the selected photos at once. This doesn't work anymore, is it broken? The keywords are not saved. The only way it works is to select only one photo and add the keyword, but this is a very time consuming and unnecessary work.
Using mac os 10.13.6 and Fotos 3.0.