diff --git a/Emacs.md b/Emacs.md
index 7e28075..f012ac9 100644
--- a/Emacs.md
+++ b/Emacs.md
@@ -133,13 +133,11 @@ For a symbol named `Name::FooBar`, all of `FooBar`, `foo bar`, `nafoba` find the
 
 Aside from definitions/references/workspace symbol, ccls provides some LSP extensions that find base/derived classes/methods, vars of a type, callers of a function. You may call:
 ```elisp
-(lsp-find-custom "$ccls/base")
 (lsp-find-custom "$ccls/callers")
-; Use lsp-goto-implementation or lsp-ui-peek-find-implementation for derived types/functions
 (lsp-find-custom "$ccls/vars")
+; Use lsp-goto-implementation or lsp-ui-peek-find-implementation for derived types/functions
 
 ;; Alternatively, use lsp-ui-peek interface
-(lsp-ui-peek-find-custom 'base "$ccls/base")
 (lsp-ui-peek-find-custom 'callers "$ccls/callers")
 
 (defun ccls/vars (kind) (lsp-ui-peek-find-custom 'vars "$ccls/vars" (plist-put (lsp--text-document-position-params) :kind kind)))
diff --git a/FAQ.md b/FAQ.md
index 8cc3dc6..a2f72f7 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -165,7 +165,7 @@ ccls will save a file in `cacheDirectory`:
 * <code>extern int <kbd>a</kbd>;</code> If `ReferenceContext.includeDeclaration` is true, the definition and declarations are also listed.
 * If no references is found but the point is on the first line, list `#include` lines referencing current file.
 
-### `$ccls/base`
+### `$ccls/memberHierarchy flat:true derived:false`
 
 * <code>struct <kbd>A</kbd>:B{void <kbd>f</kbd>()override;};</code> lists `B` or `B::f()`
 
diff --git a/Initialization-options.md b/Initialization-options.md
index 74812b2..51ac618 100644
--- a/Initialization-options.md
+++ b/Initialization-options.md
@@ -51,6 +51,13 @@ You usually want to use `index.multiVersionBlacklist` to exclude system headers.
 }
 ```
 
+## `index.onChange`: re-index for every change
+
+It is `false` by default which means to re-index when a document is saved.
+Set it to `true` to re-index for every change to a document.
+
+The performance will suffer a lot.
+
 ## `cacheFormat`: serialization format of cache files
 
 Two cache serialization formats are supported.
diff --git a/LanguageClient-neovim.md b/LanguageClient-neovim.md
index 19c4e3f..163c29c 100644
--- a/LanguageClient-neovim.md
+++ b/LanguageClient-neovim.md
@@ -73,8 +73,6 @@ nn <silent> xl :call LanguageClient#findLocations({'method':'$ccls/navigate','di
 ### Custom cross references
 
 ```vim
-" one-level base
-nn <silent> xB :call LanguageClient#findLocations({'method':'$ccls/base'})<cr>
 " bases of up to 3 levels
 nn <silent> xb :call LanguageClient#findLocations({'method':'$ccls/inheritanceHierarchy','flat':v:true,'levels':3,'derived':v:false})<cr>
 " derived of up to 3 levels