diff --git a/src/icons/icons.qrc b/src/icons/icons.qrc
index 90d9448a5..78da1cff5 100644
--- a/src/icons/icons.qrc
+++ b/src/icons/icons.qrc
@@ -47,7 +47,6 @@
         <file alias="clear_edit_16px@2x.png">images/clear_edit_16px@2x.png</file>
         <file alias="clearbreakpoints_16px.png">images/clearbreakpoints_16px.png</file>
         <file alias="clearbreakpoints_16px@2x.png">images/clearbreakpoints_16px@2x.png</file>
-        <file alias="close.png">images/close.png</file>
         <file alias="cm_add.png">images/cm_add.png</file>
         <file alias="cm_diff.png">images/cm_diff.png</file>
         <file alias="cm_erase.png">images/cm_erase.png</file>
@@ -181,9 +180,12 @@
         <file alias="marked_24.png">images/marked_24.png</file>
         <file alias="marked_64.png">images/marked_64.png</file>
         <file alias="marked_16.png">images/marked_16.png</file>
-        <file alias="folder_12.png">images/folder_12.png</file>
-        <file alias="file_12.png">images/file_12.png</file>
-        <file alias="empty_12.png">images/empty_12.png</file>
+        <file alias="folder_12px.png">images/folder_12px.png</file>
+        <file alias="folder_12px@2x.png">images/folder_12px@2x.png</file>
+        <file alias="file_12px.png">images/file_12px.png</file>
+        <file alias="file_12px@2x.png">images/file_12px@2x.png</file>
+        <file alias="empty_12px.png">images/empty_12px.png</file>
+        <file alias="empty_12px@2x.png">images/empty_12px@2x.png</file>
         <file alias="fit_front_24px.png">images/fit_front_24px.png</file>
         <file alias="fit_front_24px@2x.png">images/fit_front_24px@2x.png</file>
         <file alias="fit_back_24px.png">images/fit_back_24px.png</file>
diff --git a/src/icons/images/close.png b/src/icons/images/close.png
deleted file mode 100644
index 2600eb1a4..000000000
Binary files a/src/icons/images/close.png and /dev/null differ
diff --git a/src/icons/images/empty_12.png b/src/icons/images/empty_12.png
deleted file mode 100644
index 989ee8a3f..000000000
Binary files a/src/icons/images/empty_12.png and /dev/null differ
diff --git a/src/icons/images/file_12.png b/src/icons/images/file_12.png
deleted file mode 100644
index 5113c3262..000000000
Binary files a/src/icons/images/file_12.png and /dev/null differ
diff --git a/src/icons/images/file_12px.png b/src/icons/images/file_12px.png
new file mode 100644
index 000000000..db264cbc9
Binary files /dev/null and b/src/icons/images/file_12px.png differ
diff --git a/src/icons/images/file_12px@2x.png b/src/icons/images/file_12px@2x.png
new file mode 100644
index 000000000..f8a8a1afc
Binary files /dev/null and b/src/icons/images/file_12px@2x.png differ
diff --git a/src/icons/images/folder_12.png b/src/icons/images/folder_12.png
deleted file mode 100644
index 99459e601..000000000
Binary files a/src/icons/images/folder_12.png and /dev/null differ
diff --git a/src/icons/images/folder_12px.png b/src/icons/images/folder_12px.png
new file mode 100644
index 000000000..4de4807ee
Binary files /dev/null and b/src/icons/images/folder_12px.png differ
diff --git a/src/icons/images/folder_12px@2x.png b/src/icons/images/folder_12px@2x.png
new file mode 100644
index 000000000..cbd758fbd
Binary files /dev/null and b/src/icons/images/folder_12px@2x.png differ
diff --git a/src/icons/svg/file_12px.svg b/src/icons/svg/file_12px.svg
new file mode 100644
index 000000000..df4864548
--- /dev/null
+++ b/src/icons/svg/file_12px.svg
@@ -0,0 +1,127 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="12"
+   height="12"
+   viewBox="0 0 3.1749999 3.1750001"
+   version="1.1"
+   id="svg1011"
+   inkscape:version="1.1.2 (0a00cf5339, 2022-02-04)"
+   sodipodi:docname="file_12px.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
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+     id="namedview1013"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
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+    <linearGradient
+       inkscape:collect="always"
+       xlink:href="#linearGradient3600-4-7-3-5-4"
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+       x1="92.125969"
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+       id="linearGradient3600-4-7-3-5-4">
+      <stop
+         id="stop4915"
+         offset="0"
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+         id="stop4917"
+         offset="1"
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+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
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+       height="3.1749995"
+       x="2.5000003e-07"
+       y="2.5000003e-07"
+       inkscape:export-filename="/home/matthias/klayout/master/src/lay/lay/images/back.png"
+       inkscape:export-xdpi="27.093315"
+       inkscape:export-ydpi="27.093315" />
+    <rect
+       inkscape:export-ydpi="25.399982"
+       inkscape:export-xdpi="25.399982"
+       inkscape:export-filename="/home/matthias/klayout/master/src/lay/images/file_12.png"
+       y="-1.3156637e-06"
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+       width="3.1755505"
+       id="rect4827"
+       style="fill:none;stroke:#865b26;stroke-width:0;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1" />
+    <path
+       sodipodi:nodetypes="cccccc"
+       inkscape:export-ydpi="25.399982"
+       inkscape:export-xdpi="25.399982"
+       inkscape:export-filename="/home/matthias/klayout/master/src/lay/images/file_12.png"
+       id="path4829"
+       d="m 0.13731763,0.92543974 0.78366242,-0.7860285 2.12189705,-0.00686 V 3.0428765 H 0.13242843 Z"
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+       inkscape:export-ydpi="25.399982"
+       inkscape:export-xdpi="25.399982"
+       inkscape:export-filename="/home/matthias/klayout/master/src/lay/images/file_12.png"
+       sodipodi:nodetypes="cccc"
+       inkscape:connector-curvature="0"
+       id="path4831"
+       d="m 0.12342808,0.92852645 h 0.7967533 V 0.13248579 l -0.7967533,0.79604066"
+       style="fill:#fdfdfd;fill-opacity:1;stroke:#333333;stroke-width:0.26458333;stroke-linecap:butt;stroke-linejoin:bevel;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
+  </g>
+</svg>
diff --git a/src/icons/svg/folder_12px.svg b/src/icons/svg/folder_12px.svg
new file mode 100644
index 000000000..fbbff0764
--- /dev/null
+++ b/src/icons/svg/folder_12px.svg
@@ -0,0 +1,118 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="12"
+   height="12"
+   viewBox="0 0 3.1749999 3.1750001"
+   version="1.1"
+   id="svg1011"
+   inkscape:version="1.1.2 (0a00cf5339, 2022-02-04)"
+   sodipodi:docname="folder_12px.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1013"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:document-units="px"
+     showgrid="true"
+     units="px"
+     inkscape:snap-nodes="false"
+     inkscape:snap-bbox="true"
+     inkscape:bbox-nodes="true"
+     inkscape:snap-others="false"
+     inkscape:zoom="22.627417"
+     inkscape:cx="-10.076272"
+     inkscape:cy="9.5680386"
+     inkscape:window-width="1535"
+     inkscape:window-height="1081"
+     inkscape:window-x="116"
+     inkscape:window-y="82"
+     inkscape:window-maximized="0"
+     inkscape:current-layer="layer1"
+     width="12px">
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+       type="xygrid"
+       id="grid1074"
+       spacingx="0.13229167"
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+     id="defs1008">
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+       id="linearGradient3600">
+      <stop
+         style="stop-color:#ff9f3f;stop-opacity:1;"
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+         offset="1"
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+    </linearGradient>
+    <linearGradient
+       inkscape:collect="always"
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+    <linearGradient
+       id="linearGradient4919">
+      <stop
+         style="stop-color:#fffecc;stop-opacity:1;"
+         offset="0"
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+      <stop
+         style="stop-color:#fde85a;stop-opacity:1;"
+         offset="1"
+         id="stop4909" />
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+  </defs>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
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+       width="3.1749995"
+       height="3.1749995"
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+       y="2.5000003e-07"
+       inkscape:export-filename="/home/matthias/klayout/master/src/lay/lay/images/back.png"
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+       style="fill:none;stroke:#865b26;stroke-width:0;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1"
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+       x="1.7494865e-07"
+       y="-1.1185234e-07"
+       inkscape:export-filename="/home/matthias/klayout/master/src/lay/images/folder_12.png"
+       inkscape:export-xdpi="25.399982"
+       inkscape:export-ydpi="25.399982" />
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+       inkscape:connector-curvature="0"
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+       d="M 0.13229284,0.65681441 0.42485753,0.13253673 1.46883,0.13582434 1.6974396,0.66861225 3.0427074,0.65682203 V 3.0427492 H 0.13229284 Z"
+       id="path4891"
+       inkscape:export-filename="/home/matthias/klayout/master/src/lay/images/folder_12.png"
+       inkscape:export-xdpi="25.399982"
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diff --git a/src/lay/lay/laySaltGrainDetailsTextWidget.cc b/src/lay/lay/laySaltGrainDetailsTextWidget.cc
index 4d91af745..3bbda18a2 100644
--- a/src/lay/lay/laySaltGrainDetailsTextWidget.cc
+++ b/src/lay/lay/laySaltGrainDetailsTextWidget.cc
@@ -142,9 +142,9 @@ SaltGrainDetailsTextWidget::loadResource (int type, const QUrl &url)
 static void produce_listing (QTextStream &stream, QDir dir, int level)
 {
   for (int i = 0; i < level + 1; ++i) {
-    stream << "<img src=\":/empty_12.png\"/>&nbsp;&nbsp;";
+    stream << "<img src=\":/empty_12px.png\"/>&nbsp;&nbsp;";
   }
-  stream << "<img src=\":/folder_12.png\"/>&nbsp;&nbsp;<i>";
+  stream << "<img src=\":/folder_12px.png\"/>&nbsp;&nbsp;<i>";
   if (level > 0) {
     stream << tl::escaped_to_html (tl::to_string (dir.dirName ())).c_str ();
   } else {
@@ -162,9 +162,9 @@ static void produce_listing (QTextStream &stream, QDir dir, int level)
       produce_listing (stream, QDir (fi.filePath ()), level);
     } else {
       for (int i = 0; i < level + 1; ++i) {
-        stream << "<img src=\":/empty_12.png\"/>&nbsp;&nbsp;";
+        stream << "<img src=\":/empty_12px.png\"/>&nbsp;&nbsp;";
       }
-      stream << "<img src=\":/file_12.png\"/>&nbsp;&nbsp;" << tl::escaped_to_html (tl::to_string (*e)).c_str () << "<br/>\n";
+      stream << "<img src=\":/file_12px.png\"/>&nbsp;&nbsp;" << tl::escaped_to_html (tl::to_string (*e)).c_str () << "<br/>\n";
     }
 
   }