diff --git a/.gitattributes b/.gitattributes
index 9012585b78..21fe99f23a 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1946,6 +1946,7 @@ components/synedit/design/tsynanysyn.png -text svneol=unset#image/png
 components/synedit/design/tsynautocomplete.png -text svneol=unset#image/png
 components/synedit/design/tsyncppsyn.png -text svneol=unset#image/png
 components/synedit/design/tsyncsssyn.png -text svneol=unset#image/png
+components/synedit/design/tsyndiffsyn.png -text
 components/synedit/design/tsynedit.png -text svneol=unset#image/png
 components/synedit/design/tsynexporterhtml.png -text svneol=unset#image/png
 components/synedit/design/tsynfreepascalsyn.png -text svneol=unset#image/png
diff --git a/components/synedit/design/syneditlazdsgn.txt b/components/synedit/design/syneditlazdsgn.txt
index 5cde9ffc9e..60351b1194 100644
--- a/components/synedit/design/syneditlazdsgn.txt
+++ b/components/synedit/design/syneditlazdsgn.txt
@@ -2,6 +2,7 @@ tsynanysyn.png
 tsynautocomplete.png
 tsyncppsyn.png
 tsyncsssyn.png
+tsyndiffsyn.png
 tsynedit.png
 tsynexporterhtml.png
 tsynfreepascalsyn.png
diff --git a/components/synedit/design/tsyndiffsyn.png b/components/synedit/design/tsyndiffsyn.png
new file mode 100644
index 0000000000..da87f57729
Binary files /dev/null and b/components/synedit/design/tsyndiffsyn.png differ
diff --git a/components/synedit/syneditlazdsgn.lrs b/components/synedit/syneditlazdsgn.lrs
index 53169216dc..f4141eff9e 100644
--- a/components/synedit/syneditlazdsgn.lrs
+++ b/components/synedit/syneditlazdsgn.lrs
@@ -73,6 +73,25 @@ LazarusResources.Add('tsyncsssyn','PNG',[
   +#173#159'o/'#0#128'h'#16#253#254#26#144#132#148#5#15#135's'#240'K6'#30'?'#223
   +#1#250'?44'#228#6#248'i'#230#213'X'#218#20#176#0#0#0#0'IEND'#174'B`'#130
 ]);
+LazarusResources.Add('tsyndiffsyn','PNG',[
+  #137'PNG'#13#10#26#10#0#0#0#13'IHDR'#0#0#0#24#0#0#0#24#8#6#0#0#0#224'w='#248#0
+  +#0#0#1'sRGB'#0#174#206#28#233#0#0#0#4'gAMA'#0#0#177#143#11#252'a'#5#0#0#0#9
+  +'pHYs'#0#0#14#195#0#0#14#195#1#199'o'#168'd'#0#0#0#6'bKGD'#0#255#0#255#0#255
+  +#160#189#167#147#0#0#0#7'tIME'#7#215#12#17#20'*)'#216'L'#4'$'#0#0#1')IDATHKc'
+  +#252#15#4#12'4'#4#140' '#11'V'#175'^O'#19'+BC'#3#25#24'@'#22#172'Z'#181#238
+  +#255#253#251#183#193#184#188'|'#18'H'#136'b'#0'3'#135#9#159#211#25#25#25#25
+  +#144'1X-P'#12#142#9#248#27#20'2x-'#0'E'#15'2'#6#155#7#138'2'#24'&"`'#137#246
+  +#1#17'faUB'#180#15'hb'#1#220'PX'#184#131#162#0#13#18#178#24#175#15#224#154
+  +#145#194#28#24'+('#144'*'#22' '''#28'$'#207#16#149#162#136#242#1'r'#194'AI@D'
+  +#164#168#145#146#138#8#197'$'#30'y'#22'\r'#150#185#251#225'Rq'#158#154#12#153
+  +'^'#18#12' '#177#227#147#29#193'4'#12#128#228#22'm'#191#142#161#22'&'#128#211
+  +#2#144#2#144'a '#0'2'#16'd'#1'2'#128#201#129#196'@'#22' '#243#145#213#17#149
+  +#138'('#8'!'#252#133#29'>'#131'A'#190'B'#14'*t>L/'#217'>'#0#5#9'r'#176#160
+  +#243')'#182#128#216'`'#195#235#3#152#183'A)'#133'\'#128'5'#21#253#254#251#27
+  +'k'#170#128#5#9#136#6#169#129#129'C'#19'l'#192'|VfV'#12'w'#192'+'#253#179'g'
+  +#159#144#235'H'#156#250#140#141'e'#24#192#22#192'T'#208#162'u'#1#0#18'f'#235
+  +'#r'#193#14'c'#0#0#0#0'IEND'#174'B`'#130
+]);
 LazarusResources.Add('tsynedit','PNG',[
   #137'PNG'#13#10#26#10#0#0#0#13'IHDR'#0#0#0#24#0#0#0#24#8#6#0#0#0#224'w='#248#0
   +#0#0#6'bKGD'#0#255#0#255#0#255#160#189#167#147#0#0#0#9'pHYs'#0#0#14#196#0#0