diff --git a/docs/.vitepress/config.ts b/docs/.vitepress/config.ts
index f9f9c6b5..4ba1d91d 100644
--- a/docs/.vitepress/config.ts
+++ b/docs/.vitepress/config.ts
@@ -1,4 +1,5 @@
-import path from "path";
+import {fileURLToPath, URL} from "node:url";
+import path from "node:path";
 import {defineConfig} from "vitepress";
 
 // https://vitepress.dev/reference/site-config
@@ -13,9 +14,10 @@ export default defineConfig({
   ],
   vite: {
     resolve: {
-      alias: {
-        d3: path.resolve("./dist/d3.mjs")
-      }
+      alias: [
+        {find: "d3", replacement: path.resolve("./dist/d3.mjs")},
+        {find: /^.*\/VPFooter\.vue$/, replacement: fileURLToPath(new URL("./theme/CustomFooter.vue", import.meta.url))}
+      ]
     }
   },
   themeConfig: {
diff --git a/docs/.vitepress/theme/CustomFooter.vue b/docs/.vitepress/theme/CustomFooter.vue
new file mode 100644
index 00000000..71f7243d
--- /dev/null
+++ b/docs/.vitepress/theme/CustomFooter.vue
@@ -0,0 +1,51 @@
+<template>
+  <footer class="bg-alt f12 lh-normal">
+    <div class="flex-l">
+      <div class="ma4">
+        <a title="Home" target="_blank" href="https://observablehq.com/">
+          <svg role="img" width="173" height="24" viewBox="0 0 173 24" aria-label="Observable" fill="currentColor">
+            <path d="M40.8496 20.6083C39.7407 20.6083 38.6757 20.4234 37.6548 20.0538C36.6339 19.6842 35.7186 19.1209 34.9089 18.364C34.1168 17.607 33.4919 16.6565 33.0343 15.5124C32.5766 14.3683 32.3478 13.0218 32.3478 11.4727C32.3478 9.92375 32.5766 8.57718 33.0343 7.43305C33.5095 6.2889 34.1432 5.33839 34.9353 4.5815C35.7274 3.82462 36.6339 3.26135 37.6548 2.8917C38.6757 2.52205 39.7407 2.33723 40.8496 2.33723C41.9585 2.33723 43.0234 2.52205 44.0444 2.8917C45.0653 3.26135 45.9718 3.82462 46.7639 4.5815C47.556 5.33839 48.1809 6.2889 48.6386 7.43305C49.1138 8.57718 49.3514 9.92375 49.3514 11.4727C49.3514 13.0218 49.1225 14.3683 48.665 15.5124C48.2073 16.6565 47.5736 17.607 46.7639 18.364C45.9718 19.1209 45.0653 19.6842 44.0444 20.0538C43.0234 20.4234 41.9585 20.6083 40.8496 20.6083ZM40.8496 18.9977C41.6065 18.9977 42.2049 18.6896 42.645 18.0736C43.1027 17.4398 43.4283 16.5598 43.622 15.4332C43.8332 14.3067 43.9388 12.9865 43.9388 11.4727C43.9388 9.95894 43.8332 8.63879 43.622 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72.8892 6.79937C73.699 6.79937 74.447 6.88738 75.1335 7.06341C75.8376 7.23942 76.5505 7.50345 77.2721 7.8555L77.0609 10.839H74.6318L74.0509 8.48917C73.8749 8.45397 73.6813 8.42757 73.4701 8.40996C73.2765 8.37476 73.0389 8.35715 72.7572 8.35715C72.2644 8.35715 71.8419 8.47157 71.4898 8.70039C71.1554 8.91162 70.9882 9.24606 70.9882 9.70372C70.9882 9.98535 71.1115 10.2582 71.3578 10.5222C71.6043 10.7862 72.1851 11.0414 73.1004 11.2879L74.579 11.6839C75.8112 12.0184 76.6912 12.5377 77.2193 13.2417C77.765 13.9459 78.0379 14.8172 78.0379 15.8556C78.0379 17.4047 77.4658 18.5664 76.3216 19.3409C75.1951 20.1153 73.6637 20.5026 71.7275 20.5026ZM85.8767 8.22514C85.4718 8.22514 85.1286 8.52438 84.847 9.12285C84.5653 9.72132 84.4069 10.839 84.3717 12.476H85.6127C86.2464 12.476 86.6688 12.3528 86.88 12.1064C87.1088 11.8424 87.2233 11.3759 87.2233 10.707C87.2233 9.79173 87.0824 9.14926 86.8008 8.7796C86.5368 8.40996 86.2287 8.22514 85.8767 8.22514ZM85.9559 20.5026C84.6358 20.5026 83.4564 20.2298 82.4179 19.6842C81.3969 19.1384 80.5873 18.3552 79.9887 17.3342C79.3903 16.2957 79.091 15.0548 79.091 13.6114C79.091 12.4673 79.2935 11.4727 79.6983 10.6278C80.1032 9.78293 80.6488 9.07884 81.3353 8.51557C82.0219 7.93471 82.7876 7.50345 83.6325 7.22182C84.4774 6.94018 85.331 6.79937 86.1936 6.79937C87.4609 6.79937 88.5082 7.06341 89.3355 7.59147C90.1804 8.10193 90.8141 8.79721 91.2365 9.67732C91.659 10.5398 91.8702 11.5079 91.8702 12.5816C91.8702 12.8633 91.8614 13.1097 91.8438 13.3209C91.8262 13.5146 91.791 13.7346 91.7382 13.981H84.3981C84.5389 15.266 84.9174 16.1989 85.5335 16.7797C86.1672 17.3606 86.8712 17.651 87.6457 17.651C88.3145 17.651 88.8867 17.5367 89.3619 17.3078C89.8547 17.0614 90.286 16.7622 90.6557 16.4101L91.6854 17.4134C91.1221 18.4872 90.3477 19.2704 89.3619 19.7634C88.3937 20.2562 87.2584 20.5026 85.9559 20.5026ZM92.9624 20.0802V18.7336L94.2298 18.4432C94.2473 17.8094 94.2562 17.1406 94.2562 16.4365C94.2562 15.7149 94.2562 15.0812 94.2562 14.5355V12.8721C94.2562 12.3792 94.2473 11.9832 94.2298 11.6839C94.2298 11.3848 94.221 11.1119 94.2034 10.8654C94.2034 10.6014 94.1945 10.2934 94.177 9.94135L92.7512 9.70372V8.62118L98.5863 6.79937L99.0615 7.08981L99.2727 10.1526C99.6248 9.00844 100.127 8.16353 100.778 7.61787C101.447 7.0722 102.098 6.79937 102.732 6.79937C103.383 6.79937 103.929 6.99299 104.369 7.38024C104.826 7.74988 105.099 8.33956 105.187 9.14925C105.152 9.85333 104.941 10.4078 104.553 10.8126C104.166 11.1998 103.709 11.3935 103.18 11.3935C102.371 11.3935 101.631 10.9094 100.963 9.94135L100.831 9.75652C100.514 10.1086 100.197 10.5662 99.88 11.1295C99.5808 11.6928 99.3784 12.2736 99.2727 12.8721V14.5355C99.2727 15.046 99.2727 15.6444 99.2727 16.3309C99.2727 17.0173 99.2816 17.6687 99.2991 18.2848L101.359 18.7336V20.0802H92.9624ZM114.743 8.46277V7.22182H119.707V8.46277L118.123 8.7268L113.766 20.0802H111.39L106.69 8.7268L105.423 8.46277V7.22182H113.37V8.46277L111.971 8.7796L114.162 14.8523L116.195 8.7532L114.743 8.46277ZM129.974 20.5026C129.147 20.5026 128.478 20.3442 127.967 20.0274C127.475 19.6929 127.114 19.2265 126.885 18.628C126.374 19.1912 125.855 19.6489 125.327 20.001C124.817 20.3354 124.086 20.5026 123.136 20.5026C122.097 20.5026 121.261 20.2034 120.627 19.6049C120.011 19.0064 119.703 18.1703 119.703 17.0966C119.703 16.4101 119.853 15.8028 120.152 15.2747C120.469 14.7291 121.015 14.2363 121.789 13.7962C122.581 13.3386 123.69 12.9249 125.116 12.5552C125.327 12.5024 125.574 12.4409 125.855 12.3704C126.137 12.2825 126.427 12.2033 126.727 12.1328V11.1823C126.727 10.0558 126.594 9.28127 126.33 8.85881C126.084 8.43636 125.547 8.22514 124.72 8.22514C124.649 8.22514 124.579 8.22514 124.509 8.22514C124.456 8.22514 124.394 8.22514 124.324 8.22514V9.12285C124.324 10.1966 124.104 10.9622 123.664 11.4199C123.224 11.86 122.722 12.08 122.159 12.08C121.085 12.08 120.416 11.6047 120.152 10.6542C120.152 9.51009 120.689 8.58599 121.763 7.8819C122.854 7.16021 124.465 6.79937 126.594 6.79937C128.425 6.79937 129.71 7.20422 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7.56506C147.375 8.05792 148 8.80601 148.457 9.80933C148.933 10.7951 149.17 12.0448 149.17 13.5586C149.17 15.002 148.898 16.2429 148.352 17.2814C147.806 18.3199 147.093 19.1209 146.213 19.6842C145.351 20.2298 144.426 20.5026 143.441 20.5026C142.684 20.5026 142.024 20.3706 141.461 20.1066C140.897 19.8601 140.405 19.4993 139.982 19.0241L139.454 20.5026L134.041 20.1066ZM141.513 9.41329C141.284 9.41329 141.064 9.44848 140.853 9.5189C140.659 9.5893 140.466 9.68612 140.272 9.80933V17.5982C140.625 17.8447 141.038 17.968 141.513 17.968C142.217 17.968 142.781 17.607 143.203 16.8853C143.626 16.1637 143.837 15.0548 143.837 13.5586C143.837 12.0448 143.626 10.9799 143.203 10.3638C142.781 9.73012 142.217 9.41329 141.513 9.41329ZM150.465 20.0802V18.7336L151.653 18.4696C151.671 17.8007 151.679 17.1406 151.679 16.4893C151.697 15.838 151.707 15.1868 151.707 14.5355V3.6838L150.28 3.41977V2.23162L156.379 1.04348L156.828 1.33392L156.723 5.00396V14.5355C156.723 15.1868 156.723 15.8469 156.723 16.5157C156.74 17.167 156.758 17.8271 156.776 18.496L157.963 18.7336V20.0802H150.465ZM165.938 8.22514C165.533 8.22514 165.189 8.52438 164.908 9.12285C164.626 9.72132 164.467 10.839 164.432 12.476H165.674C166.307 12.476 166.73 12.3528 166.94 12.1064C167.169 11.8424 167.284 11.3759 167.284 10.707C167.284 9.79173 167.143 9.14926 166.861 8.7796C166.597 8.40996 166.289 8.22514 165.938 8.22514ZM166.016 20.5026C164.696 20.5026 163.517 20.2298 162.478 19.6842C161.457 19.1384 160.647 18.3552 160.049 17.3342C159.45 16.2957 159.152 15.0548 159.152 13.6114C159.152 12.4673 159.354 11.4727 159.759 10.6278C160.164 9.78293 160.71 9.07884 161.395 8.51557C162.082 7.93471 162.848 7.50345 163.693 7.22182C164.537 6.94018 165.392 6.79937 166.254 6.79937C167.522 6.79937 168.568 7.06341 169.396 7.59147C170.241 8.10193 170.874 8.79721 171.297 9.67732C171.719 10.5398 171.93 11.5079 171.93 12.5816C171.93 12.8633 171.922 13.1097 171.904 13.3209C171.886 13.5146 171.851 13.7346 171.799 13.981H164.459C164.6 15.266 164.978 16.1989 165.594 16.7797C166.228 17.3606 166.932 17.651 167.706 17.651C168.375 17.651 168.947 17.5367 169.423 17.3078C169.915 17.0614 170.346 16.7622 170.716 16.4101L171.746 17.4134C171.182 18.4872 170.408 19.2704 169.423 19.7634C168.454 20.2562 167.319 20.5026 166.016 20.5026Z"></path>
+            <path d="M11.4413 19.7265C10.3849 19.7265 9.46964 19.4977 8.69544 19.04C7.92403 18.5841 7.30727 17.9383 6.91536 17.1761C6.49867 16.3829 6.19365 15.5442 6.00767 14.6801C5.81035 13.743 5.71422 12.7903 5.72068 11.8359C5.72068 11.0802 5.77027 10.3577 5.87038 9.66687C5.96953 8.97688 6.15355 8.27548 6.42147 7.56358C6.68939 6.85167 7.03454 6.23445 7.45501 5.71104C7.89276 5.17482 8.45875 4.73835 9.10924 4.4354C9.79191 4.10837 10.568 3.9453 11.4413 3.9453C12.4977 3.9453 13.4131 4.17413 14.1873 4.63178C14.9587 5.08762 15.5755 5.73343 15.9674 6.49571C16.3811 7.28039 16.6834 8.11242 16.875 8.99178C17.0658 9.87026 17.1621 10.8189 17.1621 11.8359C17.1621 12.5917 17.1125 13.3141 17.0123 14.0049C16.9057 14.7222 16.7171 15.4272 16.4498 16.1082C16.1733 16.8201 15.8301 17.4374 15.4162 17.9608C15.0025 18.4842 14.4552 18.9094 13.7735 19.2364C13.0918 19.5634 12.3147 19.7265 11.4413 19.7265ZM13.4608 13.9249C14.0079 13.3785 14.3122 12.6225 14.3017 11.8359C14.3017 11.0232 14.0281 10.3268 13.4817 9.74686C12.9344 9.1669 12.2547 8.87692 11.4413 8.87692C10.628 8.87692 9.94827 9.1669 9.40099 9.74686C8.86507 10.2993 8.56912 11.0534 8.58102 11.8359C8.58102 12.6486 8.85467 13.3449 9.40099 13.9249C9.94827 14.5049 10.628 14.7949 11.4413 14.7949C12.2547 14.7949 12.9278 14.5049 13.4608 13.9249ZM11.4413 23.6718C17.7599 23.6718 22.8828 18.3723 22.8828 11.8359C22.8828 5.29952 17.7599 0 11.4413 0C5.12287 0 0 5.29952 0 11.8359C0 18.3723 5.12287 23.6718 11.4413 23.6718Z"></path>
+          </svg>
+        </a>
+      </div>
+      <div class="flex flex-grow-1 ma4">
+        <div class="fb6">
+          <div class="mb2 fw6 f14">Resources</div>
+          <ul>
+            <li class="mb2"><a target="_blank" href="https://talk.observablehq.com">Forum</a></li>
+            <li class="mb2"><a target="_blank" href="https://observable-community.slack.com/ssb/redirect">Slack</a></li>
+            <li class="mb2"><a target="_blank" href="https://github.com/d3/d3/releases">Releases</a></li>
+            <li class="mb2"><a target="_blank" href="https://observablehq.com/@observablehq/plot-twist-newsletter-signup">Newsletter</a></li>
+          </ul>
+        </div>
+        <div class="fb6 flex-grow-1">
+          <div class="mb2 fw6 f14">Observable</div>
+          <ul>
+            <li class="mb2"><a target="_blank" href="https://observablehq.com/product">Product</a></li>
+            <li class="mb2"><a target="_blank" href="https://observablehq.com/plot">Plot</a></li>
+            <li class="mb2"><a target="_blank" href="https://observablehq.com/data-integrations">Integrations</a></li>
+            <li class="mb2"><a target="_blank" href="https://observablehq.com/pricing">Pricing</a></li>
+            <li class="mb2"><a target="_blank" href="https://observablehq.com/enterprise">Enterprise</a></li>
+          </ul>
+        </div>
+      </div>
+    </div>
+    <div class="flex ma4">
+      © {{new Date().getUTCFullYear()}} Mike Bostock and Observable, Inc.
+      <a class="ml1" target="_blank" href="https://github.com/d3/d3/blob/main/LICENSE">ISC License</a>
+    </div>
+  </footer>
+</template>
+
+<style>
+
+footer a:hover {
+  text-decoration: underline;
+}
+
+.has-sidebar ~ footer {
+  display: none;
+}
+
+</style>
diff --git a/docs/.vitepress/theme/custom.css b/docs/.vitepress/theme/custom.css
index dcc4a87b..5e195eb8 100644
--- a/docs/.vitepress/theme/custom.css
+++ b/docs/.vitepress/theme/custom.css
@@ -67,3 +67,53 @@
 .vp-doc sub {
   line-height: 1;
 }
+
+.bg-alt {
+  background: var(--vp-c-bg-alt);
+}
+
+.lh-normal {
+  line-height: normal;
+}
+
+.flex {
+  display: flex;
+}
+
+.flex-grow-1 {
+  flex-grow: 1;
+}
+
+.ma4 {
+  margin: 2rem;
+}
+
+.ml1 {
+  margin-left: 1rem;
+}
+
+.mb2 {
+  margin-bottom: 0.5rem;
+}
+
+.f12 {
+  font-size: 12px;
+}
+
+.f14 {
+  font-size: 14px;
+}
+
+.fw6 {
+  font-weight: 600;
+}
+
+.fb6 {
+  flex-basis: 8rem;
+}
+
+@media screen and (min-width: 960px) {
+  .flex-l {
+    display: flex;
+  }
+}
diff --git a/docs/community.md b/docs/community.md
index 0810a982..3014b5bb 100644
--- a/docs/community.md
+++ b/docs/community.md
@@ -12,7 +12,7 @@ And of course, follow us on [Observable](https://observablehq.com/@observablehq?
 
 ## Getting help
 
-We recommend asking for help on the [Observable forum](https://talk.observablehq.com/c/help/6). Or if you prefer chat, join the [Observable community Slack](https://observable-community.slack.com/ssb/redirect).
+We recommend asking for help on the [Observable forum](https://talk.observablehq.com). Or if you prefer chat, join the [Observable community Slack](https://observable-community.slack.com/ssb/redirect).
 
 We encourage you to share your work, no matter how messy, on [Observable](https://observablehq.com). Sharing live code is the easiest way to let people see what you see, and to debug your problem. Strive for a [minimal, reproducible example](https://stackoverflow.com/help/minimal-reproducible-example)—it helps people hone in on your problem more quickly.