You mean open in place? (you could always in iOS open a pdf in another pdf reader, but usually, it will make a copy of the file, for example, DevonthinkToGo, which could be thought as a similar app to organize a pdf library, doesn't have "open in place" yet
I am also curious, the developers also don't say if they will support external folders like dropbox with zotfile structure
I am also curious, the developers also don't say if they will support external folders like dropbox with zotfile structure