init

src/slic3r/GUI/DeviceManager.hpp

@@ -255,6 +255,8 @@ public:
     long  tray_read_done_bits = 0;
     long  tray_reading_bits = 0;
     bool  ams_air_print_status { false };
+    /** Whether this printer supports virtual trays (external/manual filament loading).
+     *  When true, vt_slot data is used by build_filament_ams_list() to include external filaments. */
     bool  ams_support_virtual_tray { true };
     time_t ams_user_setting_start = 0;
     time_t ams_switch_filament_start = 0;
@@ -856,7 +858,16 @@ public:
     bool                        is_enable_np{ false };
     bool                        is_enable_ams_np{ false };
 
-    /*vi slot data*/
+    /**
+     * Virtual Tray (vt_slot) - External/manual filament loading slots.
+     *
+     * Data Flow: Populated from printer JSON via parse_vt_tray() during MachineObject::parse_json().
+     * Used by: Sidebar::build_filament_ams_list() when ams_support_virtual_tray is true.
+     *
+     * Virtual trays represent filament that is manually loaded into the extruder
+     * rather than fed through an AMS unit. This supports printers without AMS
+     * or scenarios where users want to bypass the AMS.
+     */
     std::vector<DevAmsTray> vt_slot;
     DevAmsTray parse_vt_tray(json vtray);