diff --git a/docs/make.jl b/docs/make.jl
index 804d5ad..604d603 100644
--- a/docs/make.jl
+++ b/docs/make.jl
@@ -8,6 +8,7 @@ makedocs(
     pages=[
         "Home" => "index.md",
         "API" => "api.md",
+        "Internals" => "internals.md",
     ],
     format=Documenter.HTML(
         sidebar_sitename=true,
diff --git a/docs/src/api.md b/docs/src/api.md
index 17c2919..2ca13c1 100644
--- a/docs/src/api.md
+++ b/docs/src/api.md
@@ -4,23 +4,18 @@
 
 ```@docs
 EvoLinearRegressor
+EvoSplineRegressor
 ```
 
-## Training & Inference
+## Training
 
 ```@docs
 EvoLinear.fit
-EvoLinear.predict_linear
-EvoLinear.predict_proj
 ```
 
-## Evaluation metrics
+## Metrics
 
-```@docs
-EvoLinear.mse
-EvoLinear.mae
-EvoLinear.logloss
-EvoLinear.poisson_deviance
-EvoLinear.gamma_deviance
-EvoLinear.tweedie_deviance
-```
\ No newline at end of file
+```@autodocs
+Modules = [EvoLinear.Metrics]
+Order   = [:type, :function, :constant]
+```
diff --git a/docs/src/assets/style.css b/docs/src/assets/style.css
index a7ae282..dd4615a 100644
--- a/docs/src/assets/style.css
+++ b/docs/src/assets/style.css
@@ -1,7 +1,7 @@
 #documenter .docs-sidebar{
     /* background-color: #023572 */
-    background-color: white;
-    border-right: 2px solid darkgray;
+    /* background-color: white; */
+    /* border-right: 2px solid darkgray; */
 }
 
 /* #documenter .docs-sidebar .docs-logo > img {
diff --git a/docs/src/internals.md b/docs/src/internals.md
new file mode 100644
index 0000000..1636112
--- /dev/null
+++ b/docs/src/internals.md
@@ -0,0 +1,9 @@
+# Internals
+
+## Others
+
+```@docs
+EvoLinear.Linear.update_∇!
+EvoLinear.Linear.predict_linear
+EvoLinear.Linear.predict_proj
+```