[WOW Classic] How can I display both herbs and ore at the same time?

[Moorea]

hopefully isboxer2 can use the game rez directly but for now what mirai linked is the workaround

[killkat]

I haven't play the game for many years, but I assume there're addons that can resize the mini map?
Then just enlarge the mini map on the slave screen, that will make the videofx viewer less blurry. In theory, this should work.