diff --git a/README.adoc b/README.adoc
index ef39de9..fdf3658 100644
--- a/README.adoc
+++ b/README.adoc
@@ -13,6 +13,21 @@
 * Visualize with GLMakie (or CairoMakie)
 ** Inspecting with GUI
 
+== Docs
+Clone this repo, and
+```sh
+$ cd docs
+
+$ julia --project -e 'using Pkg; Pkg.instantiate()'
+
+$ julia --project make.jl
+
+$ cd build
+
+$ python -m http.server --bind localhost
+
+```
+
 == TODO
 - [x] Printing
 - [ ] visualize
diff --git a/docs/src/apis.md b/docs/src/apis.md
index ab2478d..6f203de 100644
--- a/docs/src/apis.md
+++ b/docs/src/apis.md
@@ -6,3 +6,9 @@
 ```@autodocs
 Modules = [CoordVisualize]
 ```
+
+# ColorMapFuncs
+
+```@autodocs
+Modules = [CoordVisualize.ColorMapFuncs]
+```
diff --git a/docs/src/index.md b/docs/src/index.md
index eeeaa19..293bc14 100644
--- a/docs/src/index.md
+++ b/docs/src/index.md
@@ -12,7 +12,7 @@ Readers are expected to be familiar with basics of julia.
 ### Preparing
 This will take a few minutes.
 
-```juliarepl
+```julia-repl
 julia> # type ]
 
 (@v1.10) Pkg> activate .
@@ -21,24 +21,52 @@ julia> # type ]
 ```
 
 ### Parse log
-```juliarepl
+```julia-repl
 julia> using CoordVisualize
 
-julia> interactive_edit_log("coord_log_1.txt", "coord_log_2.txt")
+julia> iedit_log("coord_log_1.txt", "coord_log_2.txt")
 ...
   Follow the instruction
 ...
 ```
 
-### CoordVisualize
-Get map image file and place it as "map.png".
+### Visualize the log
+Get map image file and place it as "map.png" beforehand.
 
-```juliarepl
+```julia-repl
 julia> using GLMakie, CoordVisualize
 
-julia> tlog = include("<exported log file>");
+julia> tlog = Observable(include("<exported log file>"))
+...
+
+julia> # or
+
+julia> tlog = Observable(interactive_edit_log("log files", "log file2"))
+...
 
 julia> include("<path to root>/interactive_viz.jl")
+...
+```
+
+Available colorschemes at https://juliagraphics.github.io/ColorSchemes.jl/stable/catalogue/ .
+Available colors at https://juliagraphics.github.io/Colors.jl/stable/constructionandconversion/#Color-Parsing and https://juliagraphics.github.io/Colors.jl/stable/namedcolors/ .
+
+### Edit the log
+```julia-repl
+julia> isplit_log!(tlog[], 3, 30)
+... <with some prompts>
+
+julia> iedit_note!(tlog[], 3)
+... <with some promots>
+
+julia> ijoin_logs!(tlog[], 5, 7)
+... <with some prompts>
+
+```
+
+### Export the log
+```julia-repl
+julia> export_log(tlog[], "<filename>")
 ```
 
 ## Low level
diff --git a/interactive_viz.jl b/interactive_viz.jl
index 4fa85f4..18e7c9c 100644
--- a/interactive_viz.jl
+++ b/interactive_viz.jl
@@ -94,7 +94,7 @@ inspector_options = grid!(
     [1, 2] => toggle_inspector,
     width = options_width,
 )
-fig[1:2, 2] = grid!(
+fig[1:2, 3] = grid!(
     [0, :] => Label(fig, "Line", font = :bold),
     [1, :] => line_options,
     [2, :] => Label(fig, "Marker", font = :bold),
@@ -143,7 +143,7 @@ cbm = Colorbar(
     ticklabelsize = 10,
     label = menu_mcolormapfunc.selection,
 )
-fig[1:2, 3] = grid!(
+fig[1:2, 2] = grid!(
     [0, 1] => Label(fig, "line", font = :bold),
     [1, 1] => cbl,
     [2, 1] => Label(fig, "marker", font = :bold),
diff --git a/src/interactive_edit.jl b/src/interactive_edit.jl
index 298a8f8..b92fb50 100644
--- a/src/interactive_edit.jl
+++ b/src/interactive_edit.jl
@@ -2,6 +2,9 @@ using Statistics
 using Dates
 using Printf
 
+"""
+Interactively parse log files and edit the log.
+"""
 function iedit_log(filenames...; writetofile = true)
     printstyled(stdout, "[CoordLog Editor] \n", color = :blue, bold = true)
     logs = CoordLog[]
@@ -118,6 +121,15 @@ function iedit_log(filenames...; writetofile = true)
     return edited_logs
 end
 
+"""
+    isplit_log!(
+        logs::AbstractVector{CoordLog{T}},
+        logid::Integer,
+        pointid::Integer,
+    ) where {T}
+
+Split the log. Supply notes interactively.
+"""
 function isplit_log!(
     logs::AbstractVector{CoordLog{T}},
     logid::Integer,
@@ -143,6 +155,11 @@ function isplit_log!(
     insert!(logs, logid + 1, new_logs[2])
 end
 
+"""
+    iedit_note!(logs::AbstractVector{CoordLog{T}}, logid::Integer) where {T}
+
+Edit the note at `logid`. Supply new note interactively.
+"""
 function iedit_note!(logs::AbstractVector{CoordLog{T}}, logid::Integer) where {T}
     1 ≤ logid ≤ length(logs) ||
         throw(ArgumentError("logid out of index: ¬ 1 ≤ $(logid) ≤ $(length(logid))"))
@@ -151,6 +168,11 @@ function iedit_note!(logs::AbstractVector{CoordLog{T}}, logid::Integer) where {T
     logs[logid].note = note
 end
 
+"""
+    ijoin_logs!(logs::AbstractVector{CoordLog{T}}, logid1::Integer, logid2::Integer) where {T}
+
+Join the logs at `logid1` and `logid2`. Supply new note interactively.
+"""
 function ijoin_logs!(logs::AbstractVector{CoordLog{T}}, logid1::Integer, logid2::Integer) where {T}
     1 ≤ logid1 ≤ length(logs) ||
         throw(ArgumentError("logid1 out of index: ¬ 1 ≤ $(logid1) ≤ $(length(logid1))"))
diff --git a/src/recipes.jl b/src/recipes.jl
index 813c30c..76c87a1 100644
--- a/src/recipes.jl
+++ b/src/recipes.jl
@@ -4,16 +4,29 @@ using ColorSchemes
 
 """
 Predefined color map functions.
+Receives
+- `cmap`: colormap
+- `logs`: vector of `CoordLog`
+- `n`: number of returning ticks
+
+and returns tuple of
+1. vector of `Colorant`
+2. ticks to pass to `Colorbar`, which is a Tuple of
+    1. vector of tick location (0 to 1)
+    2. vector of tick labels (strings)
+
+Any function (or struct) which behaves like this can be used for 
+`lcolormapfunc` and `mcolormapfunc` kwargs of `trace2ds`.
 
 # Types
 
-[`ColorMapFunc`](@ref)
+[`ColorMapFunc`](@ref) is a supertype of all of these.
 
 # Interface
 
 Define these methods for the ColorMapFunc.
 
-    (AbstractVector{CoordLog}) -> Vector{∈ [0, 1]}, ticks
+    (cmap, logs, n) -> Vector{Colorant}, ticks
 """
 module ColorMapFuncs
 
@@ -26,7 +39,8 @@ using Makie: wong_colors, Scene
 # Methods
     (f::ColorMapFunc)(cmap, logs)
 
-Helper method.
+Helper struct for those use vector of 0 to 1 floats.
+Example functions are [`Date`](@ref) and [`Altitude`](@ref).
 """
 abstract type ColorMapFunc end