diff --git a/README.md b/README.md
index 20aa76c..5fbd213 100644
--- a/README.md
+++ b/README.md
@@ -422,10 +422,12 @@ parser.enable_ast();
 
 shared_ptr<peg::Ast> ast;
 if (parser.parse("...", ast)) {
-    cout << peg::ast_to_s(ast);
+  cout << peg::ast_to_s(ast);
 
-    ast = peg::AstOptimizer(true).optimize(ast);
-    cout << peg::ast_to_s(ast);
+  std::vector<std::string> exceptions = { "defenition1", "defenition2 };
+  ast = peg::AstOptimizer(true, exceptions).optimize(ast);
+
+  cout << peg::ast_to_s(ast);
 }
 ```
 
@@ -529,7 +531,15 @@ peglint - PEG syntax lint utility
 > cmake ..
 > make
 > ./peglint
-usage: peglint [--ast] [--optimize_ast_nodes|--opt] [--source text] [--trace] [grammar file path] [source file path]
+usage: grammar_file_path [source_file_path]
+
+  options:
+    --ast: show AST tree
+    --opt: optimaze all AST nodes except nodes selected with --opt-rules
+    --opt-only: optimaze only AST nodes selected with --opt-rules
+    --opt-rules rules: comma delimitted definition rules for optimazation
+    --source: source text
+    --trace: show trace messages
 ```
 
 ### Lint grammar
diff --git a/docs/index.html b/docs/index.html
index 4588dcc..b7bcde2 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -22,9 +22,9 @@
     <pre id="code-editor" class="editor-area">{{source}}</pre>
     <div class="editor-sub-header">AST</div>
     <pre id="code-ast" class="editor-area"></pre>
-    <div class="editor-sub-header">Optimized AST&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
-      On:&nbsp;<input id="optimize" type="checkbox"></input>&nbsp;&nbsp;
-      Filters:&nbsp;<input id="filters" type="text" size="48" placeholder="Enter definition names to filter delimited by comma..."></input>
+    <div class="editor-sub-header">Optimized AST&nbsp;&nbsp;&nbsp;&nbsp;
+      mode:&nbsp;<select id="opt_mode" type="checkbox"><option value="all">All</option><option value="only">Only</option></select>&nbsp;&nbsp;
+      rules:&nbsp;<input id="opt_rules" type="text" size="40" placeholder="Enter definition rules separated by comma."></input>
     </div>
     <pre id="code-ast-optimized" class="editor-area"></pre>
     <div id="code-info" class="editor-info"></div>
diff --git a/docs/index.js b/docs/index.js
index b34b229..2e0e44b 100644
--- a/docs/index.js
+++ b/docs/index.js
@@ -27,8 +27,8 @@ codeAstOptimized.setOptions({
 })
 codeAstOptimized.renderer.$cursorLayer.element.style.opacity=0;
 
-$('#optimize').prop('checked', localStorage.getItem('optimize') == 'true');
-$('#filters').val(localStorage.getItem('filters'));
+$('#opt_mode').val(localStorage.getItem('optimazationMode'));
+$('#opt_rules').val(localStorage.getItem('optimazationRules'));
 
 function generateErrorListHTML(errors) {
   let html = '<ul>';
@@ -51,14 +51,13 @@ function parse() {
   const $codeInfo = $('#code-info');
   const codeText = code.getValue();
 
-  const optimize = $('#optimize').prop('checked');
-  const filters = $('#filters').val();
-  console.log(optimize, filters);
+  const optimazationMode = $('#opt_mode').val();
+  const optimazationRules = $('#opt_rules').val();
 
   localStorage.setItem('grammarText', grammarText);
   localStorage.setItem('codeText', codeText);
-  localStorage.setItem('optimize', optimize);
-  localStorage.setItem('filters', filters);
+  localStorage.setItem('optimazationMode', optimazationMode);
+  localStorage.setItem('optimazationRules', optimazationRules);
 
   $grammarInfo.html('');
   $grammarValidation.hide();
@@ -71,7 +70,8 @@ function parse() {
    return;
   }
 
-  const data = JSON.parse(Module.lint(grammarText, codeText, optimize, filters));
+  const mode = optimazationMode == 'all';
+  const data = JSON.parse(Module.lint(grammarText, codeText, mode, optimazationRules));
 
   const isValid = data.grammar.length === 0;
   if (isValid) {
@@ -115,8 +115,8 @@ $('#grammar-info').on('click', 'li', makeOnClickInInfo(grammar));
 $('#code-info').on('click', 'li', makeOnClickInInfo(code));
 
 // Event handing in the AST optimazation
-$('#optimize').on('click', setupTimer);
-$('#filters').on('keyup', setupTimer);
+$('#opt_mode').on('change', setupTimer);
+$('#opt_rules').on('keyup', setupTimer);
 
 // Show page
 $('#main').css({
diff --git a/docs/native.cpp b/docs/native.cpp
index b889639..db37a8f 100644
--- a/docs/native.cpp
+++ b/docs/native.cpp
@@ -54,7 +54,7 @@ bool parse_code(const std::string &text, peg::parser &peg, std::string &json,
   return ret;
 }
 
-inline std::vector<std::string> splitFiltersText(const std::string &s) {
+inline std::vector<std::string> splitRulesText(const std::string &s) {
   std::vector<std::string> elems;
   std::stringstream ss(s);
   std::string elem;
@@ -67,7 +67,7 @@ inline std::vector<std::string> splitFiltersText(const std::string &s) {
 }
 
 std::string lint(const std::string &grammarText, const std::string &codeText,
-                 bool optimize, const std::string &filtersText) {
+                 bool opt_mode, const std::string &opt_rules_text) {
   std::string grammarResult;
   std::string codeResult;
   std::string astResult;
@@ -80,9 +80,9 @@ std::string lint(const std::string &grammarText, const std::string &codeText,
     std::shared_ptr<peg::Ast> ast;
     if (parse_code(codeText, peg, codeResult, ast)) {
       astResult = escape_json(peg::ast_to_s(ast));
-      auto filters = splitFiltersText(filtersText);
+      auto rules = splitRulesText(opt_rules_text);
       astResultOptimized = escape_json(
-          peg::ast_to_s(peg::AstOptimizer(optimize, filters).optimize(ast)));
+          peg::ast_to_s(peg::AstOptimizer(opt_mode, rules).optimize(ast)));
     }
   }
 
diff --git a/lint/peglint.cc b/lint/peglint.cc
index a141b3b..f8a77ff 100644
--- a/lint/peglint.cc
+++ b/lint/peglint.cc
@@ -34,8 +34,9 @@ inline vector<string> split(const string &s, char delim) {
 
 int main(int argc, const char **argv) {
   auto opt_ast = false;
-  auto opt_optimize_ast_nodes = false;
-  vector<string> optimize_ast_nodes_filters;
+  auto opt_optimize = false;
+  auto opt_mode = true;
+  vector<string> opt_rules;
   auto opt_help = false;
   auto opt_source = false;
   vector<char> source;
@@ -49,12 +50,16 @@ int main(int argc, const char **argv) {
       opt_help = true;
     } else if (string("--ast") == arg) {
       opt_ast = true;
-    } else if (string("--opt") == arg) {
-      opt_optimize_ast_nodes = true;
-    } else if (string("--filters") == arg) {
+    } else if (string("--opt-all") == arg) {
+      opt_optimize = true;
+      opt_mode = true;
+    } else if (string("--opt-only") == arg) {
+      opt_optimize = true;
+      opt_mode = false;
+    } else if (string("--opt-rules") == arg) {
       if (argi < argc) {
         std::string s = argv[argi++];
-        optimize_ast_nodes_filters = split(s, ',');
+        opt_rules = split(s, ',');
       }
     } else if (string("--source") == arg) {
       opt_source = true;
@@ -73,12 +78,16 @@ int main(int argc, const char **argv) {
     cerr << "usage: grammar_file_path [source_file_path]" << endl
          << endl
          << "  options:" << endl
-         << "    --ast: show AST tree" << endl
-         << "    --opt: optimaze AST nodes" << endl
-         << "    --filters definition_names: comma delimitted definition names "
-            "for optimazation"
-         << endl
          << "    --source: source text" << endl
+         << "    --ast: show AST tree" << endl
+         << "    --opt-all: optimaze all AST nodes except nodes selected with "
+            "--opt-rules"
+         << endl
+         << "    --opt-only: optimaze only AST nodes selected with --opt-rules"
+         << endl
+         << "    --opt-rules rules: CSV definition rules to adjust AST "
+            "optimazation"
+         << endl
          << "    --trace: show trace messages" << endl;
     return 1;
   }
@@ -164,12 +173,10 @@ int main(int argc, const char **argv) {
     std::shared_ptr<peg::Ast> ast;
     if (!parser.parse_n(source.data(), source.size(), ast)) { return -1; }
 
-    std::cout << "filters..." << std::endl;
-    for (auto name : optimize_ast_nodes_filters) {
-      std::cout << name << std::endl;
+    if (opt_optimize) {
+      ast = peg::AstOptimizer(opt_mode, opt_rules).optimize(ast);
     }
-    ast = peg::AstOptimizer(opt_optimize_ast_nodes, optimize_ast_nodes_filters)
-              .optimize(ast);
+
     std::cout << peg::ast_to_s(ast);
 
   } else {
diff --git a/peglib.h b/peglib.h
index 6369e61..f76d93f 100644
--- a/peglib.h
+++ b/peglib.h
@@ -3615,16 +3615,16 @@ ast_to_s(const std::shared_ptr<T> &ptr,
 }
 
 struct AstOptimizer {
-  AstOptimizer(bool optimize_nodes,
-               const std::vector<std::string> &filters = {})
-      : optimize_nodes_(optimize_nodes), filters_(filters) {}
+  AstOptimizer(bool mode,
+               const std::vector<std::string> &rules = {})
+      : mode_(mode), rules_(rules) {}
 
   template <typename T>
   std::shared_ptr<T> optimize(std::shared_ptr<T> original,
                               std::shared_ptr<T> parent = nullptr) {
-    auto found = std::find(filters_.begin(), filters_.end(), original->name) !=
-                 filters_.end();
-    bool opt = optimize_nodes_ ? !found : found;
+    auto found = std::find(rules_.begin(), rules_.end(), original->name) !=
+                 rules_.end();
+    bool opt = mode_ ? !found : found;
 
     if (opt && original->nodes.size() == 1) {
       auto child = optimize(original->nodes[0], parent);
@@ -3644,8 +3644,8 @@ struct AstOptimizer {
   }
 
 private:
-  const bool optimize_nodes_;
-  const std::vector<std::string> filters_;
+  const bool mode_;
+  const std::vector<std::string> rules_;
 };
 
 struct EmptyType {};