I almost always use “macro” and “macrophotography” as hashtags. I couldn’t find a way to definitely include these, except for manually typing it into the post body.
And perhaps give us a checkbox for every tab to decide whether we want to include these or not? For example for photography, I’d usually exclude the info about the insects. But if someone wants to also post that in an insect group, they will quickly have two different versions of hashtags, which helps the algorithm and keep them out of spam.
