Stores are also an event, search through the pages og events to find it.
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Conversations: So you want people to say different things depending on what's going on?
This can be done with simple 'conditional bracnhes'
What you do is make a switch for each set of text you want the NPC/Character to say when they talk and have the appropriate switch turned on after whatever event you want(make sure to turn off other convo events) and just have the text put in under the rite branch.
<>Branch if Switch [0001: Dialogue 1] is ON
<> Message:Bob: (Bob talks)
<> Message:James

james talks)((they just go back and forth))
:END
<>Branch if Switch [0002: Dialogue 2] is ON
<> Message:Bob: (Bob talks)
<> Message:James

james talks)((they just go back and forth))
<>
:END
<>Branch if Switch [0003: Dialogue 3] is ON
<> Message:Bob: (Bob talks)
<> Message:James

james talks)((they just go back and forth))
<>
:END
-- And so on. Basic rundown.