Option to set Echo only to "View Images As Separate Series"

Site likes the user preference for Echo exams when "View Images As Separate Series" is enabled for US modality. Echo exams will display in Navigator and Viewer as desired with Still and Cine Series intertwined by time as acquired as desired.

However all non Echo US exams also display this way which is not desired.

Both Echo and non Echo US studies are all modality code US.