diff --git a/Items Properties/Open associated editor/properties/subproject (respecting source type, multi-selection safe).lua b/Items Properties/Open associated editor/properties/subproject (respecting source type, multi-selection safe).lua
new file mode 100644
index 000000000..caed82884
--- /dev/null
+++ b/Items Properties/Open associated editor/properties/subproject (respecting source type, multi-selection safe).lua	
@@ -0,0 +1,59 @@
+-- @description Open associated editor/properties/subproject (respecting source type, multi-selection safe)
+-- @author BIXI DOX & ChatGPT
+-- @version 1.0
+-- @about
+--   # Open Items Explicit
+--   This script reproduces and improves REAPER’s media item's “double-click item” default action:
+--   - MIDI items → opened in the built-in MIDI editor (multi-selection consolidated automatically)
+--   - Audio items → opened in the Media Item Properties dialog (multi-selection consolidated automatically)
+--   - Subprojects → opened in new project tabs (multi-selection handled automatically by REAPER)
+--
+--   Unlike REAPER’s native double-click behavior, this script:
+--   - Does not mess with current selection state
+--   - Can be assigned to any key, toolbar button, or controller
+--   - Runs as efficiently as possible (no redundant loops or reselection).
+
+
+function open_items_explicit()
+  local sel_count = reaper.CountSelectedMediaItems(0)
+  if sel_count == 0 then return end
+
+  local has_midi, has_subproj, has_audio = false, false, false
+
+  -- Scan selected items for types
+  for i = 0, sel_count-1 do
+    local item = reaper.GetSelectedMediaItem(0, i)
+    local take = reaper.GetActiveTake(item)
+    if take then
+      local src = reaper.GetMediaItemTake_Source(take)
+      local srctype = reaper.GetMediaSourceType(src, "")
+      if srctype == "MIDI" or srctype == "MIDIPOOL" then
+        has_midi = true
+      elseif srctype == "RPP_PROJECT" then
+        has_subproj = true
+      else
+        has_audio = true
+      end
+    end
+  end
+
+  -- MIDI: one call handles all selected MIDI
+  if has_midi then
+    reaper.Main_OnCommand(40153, 0) -- Open in built-in MIDI editor
+  end
+
+  -- Subprojects: one call handles all selected subprojects
+  if has_subproj then
+    reaper.Main_OnCommand(41816, 0) -- Open project(s) in new tab(s)
+  end
+
+  -- Audio: one call handles all selected audio items
+  if has_audio then
+    reaper.Main_OnCommand(40009, 0) -- Item properties: Show media item properties
+  end
+end
+
+reaper.Undo_BeginBlock()
+open_items_explicit()
+reaper.Undo_EndBlock("Open selected items in appropriate editors/properties", -1)
+