I tried to find a thread about this issue but couldn't find it. I'm sorry if there was the same question asked before. Can we use a space in collection names? Collection buttons seem to work only if it's single word. I'd like to name one of the collections as "Real Estate" but the button (that displays) is not responsive. Any images categorized as Real Estate shows up only when I click "All". Another question is if I can apply multiple collections to one image, say "Real Estate" and "Waikiki". Please let me know. Thank you.