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Filament › Filament› Basic informationfilament_tower_interface_print_temp

Interface layer print temperature

Print temperature for prime tower interface layer (where different materials meet). If set to -1, use max recommended nozzle temperature.

Not shown with the A1. Bambu Studio hides this setting when the printer can't use it. The A1 is open (no heated chamber or air filtration), has a single extruder, no fast purge and no prime tower interface layer. It shows up with printers that have them.
This page isn’t written yet. Above is the official Bambu Studio description; the plain-words explanation, the interactive example and the typical values will come later.

Setting details

Where it is
Filament › Filament › Basic information
In the factory profile
-1 °C
Type
Ints
Unit
°C
Range
-1 – …
Visible in mode
Developer

Read more at the official source

Bambu Lab wiki (index)
In your profileBambu PLA Basic @BBL A1 · -1 °C

In Bambu Studio, the profile Bambu PLA Basic @BBL A1 sets it to-1 °C

Using another slicer? Look for the idea, not the name: in Orca Slicer almost everything has the same name; in PrusaSlicer or Cura it may be called something else, or not exist.