Pin Application to Specific Screen
Apps will launch to a given Space, if set - right click the app in the Dock &gt; Options , *.
They will only launch to a given physical display if you don't have &quot;Displays have separate Spaces&quot; on in System prefs &gt; Mission Control.
Apps do not like being spread across multiple Spaces.
*Apple use the terms Desktop and Space interchangeably, unfortunately. Display, however, always means 'physical screen'.