diff --git a/src/PlutoUI.jl b/src/PlutoUI.jl
index 3e3b8d12..ef1f3902 100644
--- a/src/PlutoUI.jl
+++ b/src/PlutoUI.jl
@@ -26,6 +26,9 @@ end # 0.1 second
 @reexport module TableOfContentsNotebook
     include("./TableOfContents.jl")
 end # 0.1 second
+@reexport module SidebarNotebook
+    include("./Sidebar.jl")
+end
 @reexport module ClockNotebook
     include("./Clock.jl")
 end # 0.04 second
diff --git a/src/Sidebar.jl b/src/Sidebar.jl
new file mode 100644
index 00000000..84241e71
--- /dev/null
+++ b/src/Sidebar.jl
@@ -0,0 +1,366 @@
+### A Pluto.jl notebook ###
+# v0.19.25
+
+using Markdown
+using InteractiveUtils
+
+# This Pluto notebook uses @bind for interactivity. When running this notebook outside of Pluto, the following 'mock version' of @bind gives bound variables a default value (instead of an error).
+macro bind(def, element)
+    quote
+        local iv = try Base.loaded_modules[Base.PkgId(Base.UUID("6e696c72-6542-2067-7265-42206c756150"), "AbstractPlutoDingetjes")].Bonds.initial_value catch; b -> missing; end
+        local el = $(esc(element))
+        global $(esc(def)) = Core.applicable(Base.get, el) ? Base.get(el) : iv(el)
+        el
+    end
+end
+
+# ╔═╡ 2d3f1d9d-2c06-4f15-a2f3-f72134e08235
+using PlutoUI
+
+# ╔═╡ 18a62430-6ca5-4c7c-94bb-be7db46fe7d8
+using HypertextLiteral
+
+# ╔═╡ cb0f1bfd-0ea9-42c6-b696-ab68a2aa703b
+
+
+# ╔═╡ 5b4c46e4-a4ab-43d9-98ef-bb69c75bdda6
+function _loc_to_style(loc::String)
+	vert, hor = split(loc)
+	res = Dict(
+		"upper" => "top: 0;",
+		"lower" => "bottom: 0;",
+		"center" => "top: 50%; transform: translateY(-50%);",
+	)[vert] * Dict(
+		"right" => "right: 0;",
+		"left" => "left: 0;",
+		"center" => "left: 50%; transform: translateX(-50%);",
+	)[hor] * get(Dict(
+		# minor corrections for some locations:
+		"lower right" => "bottom: 56px;",
+		"center center" => "transform: translateX(-50%) translateY(-50%);",
+	), loc, "")
+end
+
+# ╔═╡ 959aba38-f7b6-11ed-3890-c1a32e414109
+Sidebar(elts...; location="upper right") = @htl("""
+<aside class="sidebar" style=$(_loc_to_style(location))>$elts</aside>
+
+<style>
+aside.sidebar {
+	position: fixed;
+	max-width: min(80vw, 1000px);
+	padding: 0.5rem;
+	border: 3px solid rgba(0, 0, 0, 0.15);
+	border-radius: 10px;
+	box-shadow: 0 0 11px 0px #00000010;
+	max-height: calc(100vh - 5rem);
+	overflow: auto;
+	z-index: 100;
+	background-color: var(--main-bg-color);
+}
+
+aside.aside-sticky table {
+    margin: 0.2rem 0;
+}
+</style>
+""")
+
+# ╔═╡ 8dfccfed-0561-407d-91c3-cc89023c83b2
+map(Iterators.product(["upper", "center", "lower"], ["left", "center", "right"])) do (v, h)
+	Sidebar((;v, h), location="$v $h")
+end |> vec
+
+# ╔═╡ 4175be46-cc6e-44bf-b853-aa4f6846a842
+Sidebar(
+	"abc "^10,
+	md"---",
+	(@bind a Slider(1:10)),
+)
+
+# ╔═╡ 48aecfd3-6954-47f0-970a-27533a7e23ec
+a
+
+# ╔═╡ 00000000-0000-0000-0000-000000000001
+PLUTO_PROJECT_TOML_CONTENTS = """
+[deps]
+HypertextLiteral = "ac1192a8-f4b3-4bfe-ba22-af5b92cd3ab2"
+PlutoUI = "7f904dfe-b85e-4ff6-b463-dae2292396a8"
+
+[compat]
+HypertextLiteral = "~0.9.4"
+PlutoUI = "~0.7.51"
+"""
+
+# ╔═╡ 00000000-0000-0000-0000-000000000002
+PLUTO_MANIFEST_TOML_CONTENTS = """
+# This file is machine-generated - editing it directly is not advised
+
+julia_version = "1.9.0"
+manifest_format = "2.0"
+project_hash = "11e58608bab65beeb6c78bd55bbc9fd3623da2fd"
+
+[[deps.AbstractPlutoDingetjes]]
+deps = ["Pkg"]
+git-tree-sha1 = "8eaf9f1b4921132a4cff3f36a1d9ba923b14a481"
+uuid = "6e696c72-6542-2067-7265-42206c756150"
+version = "1.1.4"
+
+[[deps.ArgTools]]
+uuid = "0dad84c5-d112-42e6-8d28-ef12dabb789f"
+version = "1.1.1"
+
+[[deps.Artifacts]]
+uuid = "56f22d72-fd6d-98f1-02f0-08ddc0907c33"
+
+[[deps.Base64]]
+uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
+
+[[deps.ColorTypes]]
+deps = ["FixedPointNumbers", "Random"]
+git-tree-sha1 = "eb7f0f8307f71fac7c606984ea5fb2817275d6e4"
+uuid = "3da002f7-5984-5a60-b8a6-cbb66c0b333f"
+version = "0.11.4"
+
+[[deps.CompilerSupportLibraries_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "e66e0078-7015-5450-92f7-15fbd957f2ae"
+version = "1.0.2+0"
+
+[[deps.Dates]]
+deps = ["Printf"]
+uuid = "ade2ca70-3891-5945-98fb-dc099432e06a"
+
+[[deps.Downloads]]
+deps = ["ArgTools", "FileWatching", "LibCURL", "NetworkOptions"]
+uuid = "f43a241f-c20a-4ad4-852c-f6b1247861c6"
+version = "1.6.0"
+
+[[deps.FileWatching]]
+uuid = "7b1f6079-737a-58dc-b8bc-7a2ca5c1b5ee"
+
+[[deps.FixedPointNumbers]]
+deps = ["Statistics"]
+git-tree-sha1 = "335bfdceacc84c5cdf16aadc768aa5ddfc5383cc"
+uuid = "53c48c17-4a7d-5ca2-90c5-79b7896eea93"
+version = "0.8.4"
+
+[[deps.Hyperscript]]
+deps = ["Test"]
+git-tree-sha1 = "8d511d5b81240fc8e6802386302675bdf47737b9"
+uuid = "47d2ed2b-36de-50cf-bf87-49c2cf4b8b91"
+version = "0.0.4"
+
+[[deps.HypertextLiteral]]
+deps = ["Tricks"]
+git-tree-sha1 = "c47c5fa4c5308f27ccaac35504858d8914e102f9"
+uuid = "ac1192a8-f4b3-4bfe-ba22-af5b92cd3ab2"
+version = "0.9.4"
+
+[[deps.IOCapture]]
+deps = ["Logging", "Random"]
+git-tree-sha1 = "d75853a0bdbfb1ac815478bacd89cd27b550ace6"
+uuid = "b5f81e59-6552-4d32-b1f0-c071b021bf89"
+version = "0.2.3"
+
+[[deps.InteractiveUtils]]
+deps = ["Markdown"]
+uuid = "b77e0a4c-d291-57a0-90e8-8db25a27a240"
+
+[[deps.JSON]]
+deps = ["Dates", "Mmap", "Parsers", "Unicode"]
+git-tree-sha1 = "31e996f0a15c7b280ba9f76636b3ff9e2ae58c9a"
+uuid = "682c06a0-de6a-54ab-a142-c8b1cf79cde6"
+version = "0.21.4"
+
+[[deps.LibCURL]]
+deps = ["LibCURL_jll", "MozillaCACerts_jll"]
+uuid = "b27032c2-a3e7-50c8-80cd-2d36dbcbfd21"
+version = "0.6.3"
+
+[[deps.LibCURL_jll]]
+deps = ["Artifacts", "LibSSH2_jll", "Libdl", "MbedTLS_jll", "Zlib_jll", "nghttp2_jll"]
+uuid = "deac9b47-8bc7-5906-a0fe-35ac56dc84c0"
+version = "7.84.0+0"
+
+[[deps.LibGit2]]
+deps = ["Base64", "NetworkOptions", "Printf", "SHA"]
+uuid = "76f85450-5226-5b5a-8eaa-529ad045b433"
+
+[[deps.LibSSH2_jll]]
+deps = ["Artifacts", "Libdl", "MbedTLS_jll"]
+uuid = "29816b5a-b9ab-546f-933c-edad1886dfa8"
+version = "1.10.2+0"
+
+[[deps.Libdl]]
+uuid = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
+
+[[deps.LinearAlgebra]]
+deps = ["Libdl", "OpenBLAS_jll", "libblastrampoline_jll"]
+uuid = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
+
+[[deps.Logging]]
+uuid = "56ddb016-857b-54e1-b83d-db4d58db5568"
+
+[[deps.MIMEs]]
+git-tree-sha1 = "65f28ad4b594aebe22157d6fac869786a255b7eb"
+uuid = "6c6e2e6c-3030-632d-7369-2d6c69616d65"
+version = "0.1.4"
+
+[[deps.Markdown]]
+deps = ["Base64"]
+uuid = "d6f4376e-aef5-505a-96c1-9c027394607a"
+
+[[deps.MbedTLS_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "c8ffd9c3-330d-5841-b78e-0817d7145fa1"
+version = "2.28.2+0"
+
+[[deps.Mmap]]
+uuid = "a63ad114-7e13-5084-954f-fe012c677804"
+
+[[deps.MozillaCACerts_jll]]
+uuid = "14a3606d-f60d-562e-9121-12d972cd8159"
+version = "2022.10.11"
+
+[[deps.NetworkOptions]]
+uuid = "ca575930-c2e3-43a9-ace4-1e988b2c1908"
+version = "1.2.0"
+
+[[deps.OpenBLAS_jll]]
+deps = ["Artifacts", "CompilerSupportLibraries_jll", "Libdl"]
+uuid = "4536629a-c528-5b80-bd46-f80d51c5b363"
+version = "0.3.21+4"
+
+[[deps.Parsers]]
+deps = ["Dates", "PrecompileTools", "UUIDs"]
+git-tree-sha1 = "a5aef8d4a6e8d81f171b2bd4be5265b01384c74c"
+uuid = "69de0a69-1ddd-5017-9359-2bf0b02dc9f0"
+version = "2.5.10"
+
+[[deps.Pkg]]
+deps = ["Artifacts", "Dates", "Downloads", "FileWatching", "LibGit2", "Libdl", "Logging", "Markdown", "Printf", "REPL", "Random", "SHA", "Serialization", "TOML", "Tar", "UUIDs", "p7zip_jll"]
+uuid = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
+version = "1.9.0"
+
+[[deps.PlutoUI]]
+deps = ["AbstractPlutoDingetjes", "Base64", "ColorTypes", "Dates", "FixedPointNumbers", "Hyperscript", "HypertextLiteral", "IOCapture", "InteractiveUtils", "JSON", "Logging", "MIMEs", "Markdown", "Random", "Reexport", "URIs", "UUIDs"]
+git-tree-sha1 = "b478a748be27bd2f2c73a7690da219d0844db305"
+uuid = "7f904dfe-b85e-4ff6-b463-dae2292396a8"
+version = "0.7.51"
+
+[[deps.PrecompileTools]]
+deps = ["Preferences"]
+git-tree-sha1 = "259e206946c293698122f63e2b513a7c99a244e8"
+uuid = "aea7be01-6a6a-4083-8856-8a6e6704d82a"
+version = "1.1.1"
+
+[[deps.Preferences]]
+deps = ["TOML"]
+git-tree-sha1 = "7eb1686b4f04b82f96ed7a4ea5890a4f0c7a09f1"
+uuid = "21216c6a-2e73-6563-6e65-726566657250"
+version = "1.4.0"
+
+[[deps.Printf]]
+deps = ["Unicode"]
+uuid = "de0858da-6303-5e67-8744-51eddeeeb8d7"
+
+[[deps.REPL]]
+deps = ["InteractiveUtils", "Markdown", "Sockets", "Unicode"]
+uuid = "3fa0cd96-eef1-5676-8a61-b3b8758bbffb"
+
+[[deps.Random]]
+deps = ["SHA", "Serialization"]
+uuid = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
+
+[[deps.Reexport]]
+git-tree-sha1 = "45e428421666073eab6f2da5c9d310d99bb12f9b"
+uuid = "189a3867-3050-52da-a836-e630ba90ab69"
+version = "1.2.2"
+
+[[deps.SHA]]
+uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
+version = "0.7.0"
+
+[[deps.Serialization]]
+uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
+
+[[deps.Sockets]]
+uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
+
+[[deps.SparseArrays]]
+deps = ["Libdl", "LinearAlgebra", "Random", "Serialization", "SuiteSparse_jll"]
+uuid = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
+
+[[deps.Statistics]]
+deps = ["LinearAlgebra", "SparseArrays"]
+uuid = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
+version = "1.9.0"
+
+[[deps.SuiteSparse_jll]]
+deps = ["Artifacts", "Libdl", "Pkg", "libblastrampoline_jll"]
+uuid = "bea87d4a-7f5b-5778-9afe-8cc45184846c"
+version = "5.10.1+6"
+
+[[deps.TOML]]
+deps = ["Dates"]
+uuid = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
+version = "1.0.3"
+
+[[deps.Tar]]
+deps = ["ArgTools", "SHA"]
+uuid = "a4e569a6-e804-4fa4-b0f3-eef7a1d5b13e"
+version = "1.10.0"
+
+[[deps.Test]]
+deps = ["InteractiveUtils", "Logging", "Random", "Serialization"]
+uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[[deps.Tricks]]
+git-tree-sha1 = "aadb748be58b492045b4f56166b5188aa63ce549"
+uuid = "410a4b4d-49e4-4fbc-ab6d-cb71b17b3775"
+version = "0.1.7"
+
+[[deps.URIs]]
+git-tree-sha1 = "074f993b0ca030848b897beff716d93aca60f06a"
+uuid = "5c2747f8-b7ea-4ff2-ba2e-563bfd36b1d4"
+version = "1.4.2"
+
+[[deps.UUIDs]]
+deps = ["Random", "SHA"]
+uuid = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
+
+[[deps.Unicode]]
+uuid = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"
+
+[[deps.Zlib_jll]]
+deps = ["Libdl"]
+uuid = "83775a58-1f1d-513f-b197-d71354ab007a"
+version = "1.2.13+0"
+
+[[deps.libblastrampoline_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "8e850b90-86db-534c-a0d3-1478176c7d93"
+version = "5.7.0+0"
+
+[[deps.nghttp2_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "8e850ede-7688-5339-a07c-302acd2aaf8d"
+version = "1.48.0+0"
+
+[[deps.p7zip_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "3f19e933-33d8-53b3-aaab-bd5110c3b7a0"
+version = "17.4.0+0"
+"""
+
+# ╔═╡ Cell order:
+# ╠═2d3f1d9d-2c06-4f15-a2f3-f72134e08235
+# ╠═8dfccfed-0561-407d-91c3-cc89023c83b2
+# ╠═4175be46-cc6e-44bf-b853-aa4f6846a842
+# ╠═48aecfd3-6954-47f0-970a-27533a7e23ec
+# ╠═cb0f1bfd-0ea9-42c6-b696-ab68a2aa703b
+# ╠═18a62430-6ca5-4c7c-94bb-be7db46fe7d8
+# ╠═959aba38-f7b6-11ed-3890-c1a32e414109
+# ╠═5b4c46e4-a4ab-43d9-98ef-bb69c75bdda6
+# ╟─00000000-0000-0000-0000-000000000001
+# ╟─00000000-0000-0000-0000-000000000002