multi voice and techniques

Hello all, I'm very new at all of this, so please excuse me if I ask something obvious.
Is it possible to apply a "technique" to only one voice of a multi-voice section with Notion, or do I have to make a new staff line for that?
I'm trying to enter measures for bass where one part is whole notes played with the bow, and one part is quarter notes with the "pizz" technique. If I try to put "pizz" in, it applies it to both voices, not just the current voice I'm editing.
Is it possible to apply a "technique" to only one voice of a multi-voice section with Notion, or do I have to make a new staff line for that?
I'm trying to enter measures for bass where one part is whole notes played with the bow, and one part is quarter notes with the "pizz" technique. If I try to put "pizz" in, it applies it to both voices, not just the current voice I'm editing.