diff --git a/docs/chapters/canonical/canonical.js b/docs/chapters/canonical/canonical.js
index 30520387..de0f3f51 100644
--- a/docs/chapters/canonical/canonical.js
+++ b/docs/chapters/canonical/canonical.js
@@ -70,8 +70,8 @@ drawRegions(shapes, w,h,unit) {
         setStroke(`black`);
         setFill(`black`);
         text(`← Single inflection →`, 0, unit*1.75, CENTER);
-        text(`↔ Plain curve ↕`, unit/2, -h/3);
-        text(`↕ Double inflection`, -w/2 + 10, 10 + unit * 0.5);
+        text(`Plain curve`, unit/2, -h/3);
+        text(`Double inflection`, -w/2 + 10, 10 + unit * 0.5);
     });
 }
 
diff --git a/docs/images/chapters/canonical/8d2874007d6aa471b87e85d43b78e2a1.png b/docs/images/chapters/canonical/8d2874007d6aa471b87e85d43b78e2a1.png
new file mode 100644
index 00000000..eea3208c
Binary files /dev/null and b/docs/images/chapters/canonical/8d2874007d6aa471b87e85d43b78e2a1.png differ
diff --git a/docs/images/chapters/canonical/c3e9b97768440f85858a10e52def2d5d.png b/docs/images/chapters/canonical/c3e9b97768440f85858a10e52def2d5d.png
deleted file mode 100644
index 866f21c0..00000000
Binary files a/docs/images/chapters/canonical/c3e9b97768440f85858a10e52def2d5d.png and /dev/null differ
diff --git a/docs/index.html b/docs/index.html
index 2ec50274..e791e5e1 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -3965,7 +3965,7 @@ function getCubicRoots(pa, pb, pc, pd) {
               <img
                 width="400px"
                 height="400px"
-                src="images\chapters\canonical\c3e9b97768440f85858a10e52def2d5d.png"
+                src="images\chapters\canonical\8d2874007d6aa471b87e85d43b78e2a1.png"
                 loading="lazy"
               />
               Scripts are disabled. Showing fallback image.
diff --git a/docs/ja-JP/index.html b/docs/ja-JP/index.html
index 5fa557b6..07ef10bd 100644
--- a/docs/ja-JP/index.html
+++ b/docs/ja-JP/index.html
@@ -3673,7 +3673,7 @@ function getCubicRoots(pa, pb, pc, pd) {
               <img
                 width="400px"
                 height="400px"
-                src="images\chapters\canonical\c3e9b97768440f85858a10e52def2d5d.png"
+                src="images\chapters\canonical\8d2874007d6aa471b87e85d43b78e2a1.png"
                 loading="lazy"
               />
               Scripts are disabled. Showing fallback image.
diff --git a/docs/zh-CN/index.html b/docs/zh-CN/index.html
index b0037a7f..bcb59425 100644
--- a/docs/zh-CN/index.html
+++ b/docs/zh-CN/index.html
@@ -3683,7 +3683,7 @@ function getCubicRoots(pa, pb, pc, pd) {
               <img
                 width="400px"
                 height="400px"
-                src="images\chapters\canonical\c3e9b97768440f85858a10e52def2d5d.png"
+                src="images\chapters\canonical\8d2874007d6aa471b87e85d43b78e2a1.png"
                 loading="lazy"
               />
               Scripts are disabled. Showing fallback image.