diff --git a/Source/Plugins/BuilderModes/FindReplace/FindLinedefTags.cs b/Source/Plugins/BuilderModes/FindReplace/FindLinedefTags.cs
index 86cb459..82f8660 100644
--- a/Source/Plugins/BuilderModes/FindReplace/FindLinedefTags.cs
+++ b/Source/Plugins/BuilderModes/FindReplace/FindLinedefTags.cs
@@ -75,6 +75,22 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				}
 			}
 
+			// Check for comparison operators
+			string comparer;
+			if (value[0].ToString() == ">" || value[0].ToString() == "<")
+			{
+				comparer = value.Substring(0, 1);
+				if (value.Length > 1)
+					if (value[1].ToString() == "=")
+						comparer = value.Substring(0, 2);
+				value = value.Remove(0, comparer.Length);
+			}
+			else
+				comparer = "";
+
+			if (value.Length == 0)
+				return objs.ToArray();
+
 			// Interpret the number given
 			int tag;
 			if(int.TryParse(value, out tag))
@@ -86,8 +102,16 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				foreach(Linedef l in list)
 				{
 					// Tag matches?
-					int index = l.Tags.IndexOf(tag);
-					if(index != -1)
+					int index = -1;
+					for (int i = 0; i < l.Tags.Count; i++)
+						if ((l.Tags[i] == tag && comparer.ToString() == "") ||
+							(l.Tags[i] > tag && comparer.ToString() == ">") ||
+							(l.Tags[i] < tag && comparer.ToString() == "<") ||
+							(l.Tags[i] >= tag && comparer.ToString() == ">=") ||
+							(l.Tags[i] <= tag && comparer.ToString() == "<="))
+						index = l.Tags[i];
+
+					if (index != -1)
 					{
 						// Replace
 						if(replace)
diff --git a/Source/Plugins/BuilderModes/FindReplace/FindSectorBrightness.cs b/Source/Plugins/BuilderModes/FindReplace/FindSectorBrightness.cs
index 752ad31..1437fdd 100644
--- a/Source/Plugins/BuilderModes/FindReplace/FindSectorBrightness.cs
+++ b/Source/Plugins/BuilderModes/FindReplace/FindSectorBrightness.cs
@@ -35,6 +35,22 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				}
 			}
 
+			// Check for comparison operators
+			string comparer;
+			if (value[0].ToString() == ">" || value[0].ToString() == "<")
+			{
+				comparer = value.Substring(0, 1);
+				if (value.Length > 1)
+					if (value[1].ToString() == "=")
+						comparer = value.Substring(0, 2);
+				value = value.Remove(0, comparer.Length);
+			}
+			else
+				comparer = "";
+
+			if (value.Length == 0)
+				return objs.ToArray();
+
 			// Interpret the number given
 			int brightness;
 			if(int.TryParse(value, out brightness)) 
@@ -46,7 +62,11 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				foreach(Sector s in list) 
 				{
 					// Brightness matches?
-					if(s.Brightness == brightness) 
+					if ((s.Brightness == brightness && comparer.ToString() == "") ||
+						(s.Brightness > brightness && comparer.ToString() == ">") ||
+						(s.Brightness < brightness && comparer.ToString() == "<") ||
+						(s.Brightness >= brightness && comparer.ToString() == ">=") ||
+						(s.Brightness <= brightness && comparer.ToString() == "<="))
 					{
 						// Replace
 						if(replace) s.Brightness = replacebrightness;
diff --git a/Source/Plugins/BuilderModes/FindReplace/FindSectorCeilingHeight.cs b/Source/Plugins/BuilderModes/FindReplace/FindSectorCeilingHeight.cs
index 5cd123e..9e0465e 100644
--- a/Source/Plugins/BuilderModes/FindReplace/FindSectorCeilingHeight.cs
+++ b/Source/Plugins/BuilderModes/FindReplace/FindSectorCeilingHeight.cs
@@ -33,6 +33,22 @@ namespace CodeImp.DoomBuilder.BuilderModes.FindReplace
 				}
 			}
 
+			// Check for comparison operators
+			string comparer;
+			if (value[0].ToString() == ">" || value[0].ToString() == "<")
+			{
+				comparer = value.Substring(0, 1);
+				if (value.Length > 1)
+					if (value[1].ToString() == "=")
+						comparer = value.Substring(0, 2);
+				value = value.Remove(0, comparer.Length);
+			}
+			else
+				comparer = "";
+
+			if (value.Length == 0)
+				return objs.ToArray();
+
 			// Interpret the number given
 			int height;
 			if(int.TryParse(value, out height)) 
@@ -44,7 +60,11 @@ namespace CodeImp.DoomBuilder.BuilderModes.FindReplace
 				foreach(Sector s in list) 
 				{
 					// Height matches?
-					if(s.CeilHeight == height) 
+					if ((s.CeilHeight == height && comparer.ToString() == "") ||
+						(s.CeilHeight > height && comparer.ToString() == ">") ||
+						(s.CeilHeight < height && comparer.ToString() == "<") ||
+						(s.CeilHeight >= height && comparer.ToString() == ">=") ||
+						(s.CeilHeight <= height && comparer.ToString() == "<="))
 					{
 						// Replace
 						if(replace) s.CeilHeight = replaceheight;
diff --git a/Source/Plugins/BuilderModes/FindReplace/FindSectorFloorHeight.cs b/Source/Plugins/BuilderModes/FindReplace/FindSectorFloorHeight.cs
index 05316e6..4393eb4 100644
--- a/Source/Plugins/BuilderModes/FindReplace/FindSectorFloorHeight.cs
+++ b/Source/Plugins/BuilderModes/FindReplace/FindSectorFloorHeight.cs
@@ -33,6 +33,22 @@ namespace CodeImp.DoomBuilder.BuilderModes.FindReplace
 				}
 			}
 
+			// Check for comparison operators
+			string comparer;
+			if (value[0].ToString() == ">" || value[0].ToString() == "<")
+			{
+				comparer = value.Substring(0, 1);
+				if (value.Length > 1)
+					if (value[1].ToString() == "=")
+						comparer = value.Substring(0, 2);
+				value = value.Remove(0, comparer.Length);
+			}
+			else
+				comparer = "";
+
+			if (value.Length == 0)
+				return objs.ToArray();
+
 			// Interpret the number given
 			int height;
 			if(int.TryParse(value, out height)) 
@@ -44,7 +60,11 @@ namespace CodeImp.DoomBuilder.BuilderModes.FindReplace
 				foreach(Sector s in list) 
 				{
 					// Height matches?
-					if(s.FloorHeight == height) 
+					if ((s.FloorHeight == height && comparer.ToString() == "") ||
+						(s.FloorHeight > height && comparer.ToString() == ">") ||
+						(s.FloorHeight < height && comparer.ToString() == "<") ||
+						(s.FloorHeight >= height && comparer.ToString() == ">=") ||
+						(s.FloorHeight <= height && comparer.ToString() == "<="))
 					{
 						// Replace
 						if(replace) s.FloorHeight = replaceheight;
diff --git a/Source/Plugins/BuilderModes/FindReplace/FindSectorTags.cs b/Source/Plugins/BuilderModes/FindReplace/FindSectorTags.cs
index 5668ee1..f06b6a6 100644
--- a/Source/Plugins/BuilderModes/FindReplace/FindSectorTags.cs
+++ b/Source/Plugins/BuilderModes/FindReplace/FindSectorTags.cs
@@ -68,7 +68,23 @@ namespace CodeImp.DoomBuilder.BuilderModes
 					return objs.ToArray();
 				}
 			}
-			
+
+			// Check for comparison operators
+			string comparer;
+			if (value[0].ToString() == ">" || value[0].ToString() == "<")
+			{
+				comparer = value.Substring(0, 1);
+				if (value.Length > 1)
+					if (value[1].ToString() == "=")
+						comparer = value.Substring(0, 2);
+				value = value.Remove(0, comparer.Length);
+			}
+			else
+				comparer = "";
+
+			if (value.Length == 0)
+				return objs.ToArray();
+
 			// Interpret the number given
 			int tag;
 			if(int.TryParse(value, out tag))
@@ -80,8 +96,15 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				foreach(Sector s in list)
 				{
 					// Tag matches?
-					int index = s.Tags.IndexOf(tag);
-					if(index != -1)
+					int index = -1;
+					for (int i = 0; i < s.Tags.Count; i++)
+						if ((s.Tags[i] == tag && comparer.ToString() == "") ||
+							(s.Tags[i] > tag && comparer.ToString() == ">") ||
+							(s.Tags[i] < tag && comparer.ToString() == "<") ||
+							(s.Tags[i] >= tag && comparer.ToString() == ">=") ||
+							(s.Tags[i] <= tag && comparer.ToString() == "<="))
+							index = s.Tags[i];
+					if (index != -1)
 					{
 						// Replace
 						if(replace)
diff --git a/Source/Plugins/BuilderModes/FindReplace/FindThingAngle.cs b/Source/Plugins/BuilderModes/FindReplace/FindThingAngle.cs
index fc8c81a..1420da1 100644
--- a/Source/Plugins/BuilderModes/FindReplace/FindThingAngle.cs
+++ b/Source/Plugins/BuilderModes/FindReplace/FindThingAngle.cs
@@ -82,6 +82,22 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				}
 			}
 
+			// Check for comparison operators
+			string comparer;
+			if (value[0].ToString() == ">" || value[0].ToString() == "<")
+			{
+				comparer = value.Substring(0, 1);
+				if (value.Length > 1)
+					if (value[1].ToString() == "=")
+						comparer = value.Substring(0, 2);
+				value = value.Remove(0, comparer.Length);
+			}
+			else
+				comparer = "";
+
+			if (value.Length == 0)
+				return objs.ToArray();
+
 			// Interpret the number given
 			int angle;
 			if(int.TryParse(value, out angle))
@@ -93,7 +109,11 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				foreach(Thing t in list)
 				{
 					// Match?
-					if(t.AngleDoom == angle)
+					if ((t.AngleDoom == angle && comparer.ToString() == "") ||
+						(t.AngleDoom > angle && comparer.ToString() == ">") ||
+						(t.AngleDoom < angle && comparer.ToString() == "<") ||
+						(t.AngleDoom >= angle && comparer.ToString() == ">=") ||
+						(t.AngleDoom <= angle && comparer.ToString() == "<="))
 					{
 						// Replace
 						if(replace) t.Rotate(replaceangle);
diff --git a/Source/Plugins/BuilderModes/FindReplace/FindThingType.cs b/Source/Plugins/BuilderModes/FindReplace/FindThingType.cs
index e366f34..2c2cdda 100644
--- a/Source/Plugins/BuilderModes/FindReplace/FindThingType.cs
+++ b/Source/Plugins/BuilderModes/FindReplace/FindThingType.cs
@@ -84,6 +84,22 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				}
 			}
 
+			// Check for comparison operators
+			string comparer;
+			if (value[0].ToString() == ">" || value[0].ToString() == "<")
+			{
+				comparer = value.Substring(0, 1);
+				if (value.Length > 1)
+					if (value[1].ToString() == "=")
+						comparer = value.Substring(0, 2);
+				value = value.Remove(0, comparer.Length);
+			}
+			else
+				comparer = "";
+
+			if (value.Length == 0)
+				return objs.ToArray();
+
 			// Interpret the number given
 			int findtype;
 			if(int.TryParse(value, out findtype))
@@ -95,7 +111,11 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				foreach(Thing t in list)
 				{
 					// Match?
-					if(t.SRB2Type == findtype)
+					if ((t.SRB2Type == findtype && comparer.ToString() == "") ||
+						(t.SRB2Type > findtype && comparer.ToString() == ">") ||
+						(t.SRB2Type < findtype && comparer.ToString() == "<") ||
+						(t.SRB2Type >= findtype && comparer.ToString() == ">=") ||
+						(t.SRB2Type <= findtype && comparer.ToString() == "<="))
 					{
 						// Replace
 						if(replace)