diff --git a/Markers/amagalma_Insert time signature changes Tool.lua b/Markers/amagalma_Insert time signature changes Tool.lua
new file mode 100644
index 000000000..514d4de99
--- /dev/null
+++ b/Markers/amagalma_Insert time signature changes Tool.lua	
@@ -0,0 +1,98 @@
+-- @description Insert time signature changes Tool
+-- @author amagalma
+-- @version 1.00
+-- @donation https://www.paypal.me/amagalma
+-- @about Inserts a time signature change at the closest start of measure position to the edit cursor
+
+local font_size = 16
+
+-------------------------------------------------------------
+
+local button_width = math.floor(font_size*2)
+local radio_space = math.floor(font_size*1.25)
+local Denominator, _ = tonumber(reaper.GetExtState( "amagalma_timesig_tool", "denom" )) or 4
+
+reaper.atexit( function()
+  reaper.SetExtState( "amagalma_timesig_tool", "denom", Denominator, false )
+end)
+
+-------------------------------------------------------------
+
+local function AddSignature( num )
+  reaper.Undo_BeginBlock()
+  reaper.PreventUIRefresh(1)
+
+  -- Bring cursor to closest measure start
+  local cur_pos = reaper.GetCursorPosition()
+  if reaper.GetToggleCommandState( 1157 ) == 0 then
+    reaper.Main_OnCommand(40754, 0) -- Enable snap
+    restore_snap = true
+  end
+  reaper.Main_OnCommand(40725, 0) -- Toggle measure grid
+  local snaped_pos = reaper.SnapToGrid( 0, cur_pos )
+  if restore_snap then
+    reaper.Main_OnCommand(40753, 0) -- Disable snap
+  end
+  reaper.Main_OnCommand(40725, 0) -- Toggle measure grid
+
+  -- Get info of time signature in effect
+  local _, measures = reaper.TimeMap2_timeToBeats( 0, snaped_pos )
+  local ptx_in_effect = reaper.FindTempoTimeSigMarker( 0, snaped_pos )
+
+  -- Add num/denom measure
+  reaper.SetTempoTimeSigMarker( 0, -1, -1, measures, 0, -1, num, Denominator, true )
+  reaper.GetSetTempoTimeSigMarkerFlag( 0, ptx_in_effect+1, 1|2|16, true )
+
+  reaper.PreventUIRefresh(-1)
+  reaper.Undo_EndBlock( string.format("Change to %i/%i",num,Denominator), 1|4|8 )
+  reaper.SetCursorContext( 1 )
+end
+
+-------------------------------------------------------------
+
+package.path = reaper.ImGui_GetBuiltinPath() .. '/?.lua'
+local ImGui = require 'imgui' '0.9.3.2'
+local ctx = ImGui.CreateContext('amagalma_Insert time signature changes Tool')
+local font = ImGui.CreateFont('sans-serif', font_size)
+ImGui.Attach(ctx, font)
+
+local window_flags = ImGui.WindowFlags_NoCollapse | ImGui.WindowFlags_AlwaysAutoResize
+
+local function loop()
+  ImGui.PushFont(ctx, font)
+  local visible, open = ImGui.Begin(ctx, 'Time Signature Tool', true, window_flags)
+  if visible then
+    ImGui.Text(ctx, 'Insert Time Signature with Nominator :')
+    if ImGui.Button(ctx, '2',button_width) then AddSignature(2) end ; ImGui.SameLine(ctx)
+    if ImGui.Button(ctx, '3',button_width) then AddSignature(3) end ; ImGui.SameLine(ctx)
+    if ImGui.Button(ctx, '4',button_width) then AddSignature(4) end ; ImGui.SameLine(ctx)
+    if ImGui.Button(ctx, '5',button_width) then AddSignature(5) end ; ImGui.SameLine(ctx)
+    if ImGui.Button(ctx, '6',button_width) then AddSignature(6) end ; ImGui.SameLine(ctx)
+    if ImGui.Button(ctx, '7',button_width) then AddSignature(7) end ; ImGui.SameLine(ctx)
+    if ImGui.Button(ctx, '8',button_width) then AddSignature(8) end
+    if ImGui.Button(ctx, '9',button_width) then AddSignature(9) end ; ImGui.SameLine(ctx)
+    if ImGui.Button(ctx, '10',button_width) then AddSignature(10) end ; ImGui.SameLine(ctx)
+    if ImGui.Button(ctx, '11',button_width) then AddSignature(11) end ; ImGui.SameLine(ctx)
+    if ImGui.Button(ctx, '12',button_width) then AddSignature(12) end ; ImGui.SameLine(ctx)
+    if ImGui.Button(ctx, '13',button_width) then AddSignature(13) end ; ImGui.SameLine(ctx)
+    if ImGui.Button(ctx, '14',button_width) then AddSignature(14) end ; ImGui.SameLine(ctx)
+    if ImGui.Button(ctx, '15',button_width) then AddSignature(15) end
+
+    ImGui.Spacing(ctx)
+
+    ImGui.Text(ctx, 'Denominator :')
+    _,Denominator = ImGui.RadioButtonEx(ctx, '1/16', Denominator, 16); ImGui.SameLine(ctx,nil,radio_space)
+    _,Denominator = ImGui.RadioButtonEx(ctx, '1/8', Denominator, 8); ImGui.SameLine(ctx,nil,radio_space)
+    _,Denominator = ImGui.RadioButtonEx(ctx, '1/4', Denominator, 4); ImGui.SameLine(ctx,nil,radio_space)
+    _,Denominator = ImGui.RadioButtonEx(ctx, '1/2', Denominator, 2)
+
+    ImGui.End(ctx)
+  end
+  ImGui.PopFont(ctx)
+
+  if open then
+    reaper.defer(loop)
+  end
+end
+
+reaper.defer(loop)