Include Other Categories In A Category

Lets say you have a category called : Everything Else

you want to have this category as a view (or something ) including the categories A, B, C

so basically Everything else ( or whatever the cat name we choose) would be a MERGE of A B and C

is that doable ?

Assign the products of A, B and C to Everything Else…

lol that's the prob, a mass edit on products is long and the apply bulk features ( OVERRIDES currently SET categories…)

so if product A is tied to Cat 1,2,3,4,5

product B to 3,4,5,6,7

then massupdate of A and B adding category 9 will remove all and only assign 9… bug or lack of feature no idea

export categories and secondary categories, add the new extra secondary categories and import back in