diff --git a/talk/C++Course.tex b/talk/C++Course.tex
index a1fb6c00..bb06acbc 100644
--- a/talk/C++Course.tex
+++ b/talk/C++Course.tex
@@ -147,7 +147,7 @@
   \input{objectorientation/adl}
 \end{advanced}
 
-\section[More]{Core modern \cpp}
+\section[Core]{Core modern \cpp}
 \input{morelanguage/constness}
 \begin{advanced}
   \input{morelanguage/constexpr}
diff --git a/talk/basicconcepts/assert.tex b/talk/basicconcepts/assert.tex
index 5ad4cbc4..6911443c 100644
--- a/talk/basicconcepts/assert.tex
+++ b/talk/basicconcepts/assert.tex
@@ -77,7 +77,7 @@
     \begin{cppcode*}{}
       double f(UserType a) {
         static_assert(
-          std::is_floating_point<UserType>::value,
+          std::is_floating_point_v<UserType>, // C++17
           "This function expects floating-point types.");
         return std::sqrt(a);
       }
@@ -89,7 +89,7 @@
 \textcolor{blue}{a.cpp:3:9:} \textcolor{red}{error:} \textcolor{blue}{static assertion failed: This function}
                                            \textcolor{blue}{expects floating-point types.}
    2 | static_assert(
-     |   \textcolor{red}{std::is_floating_point<UserType>::value},
-     |   \textcolor{red}{~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
+     |   \textcolor{red}{std::is_floating_point_v<UserType>},
+     |   \textcolor{red}{~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
   \end{Verbatim}
 \end{frame}
diff --git a/talk/basicconcepts/coresyntax.tex b/talk/basicconcepts/coresyntax.tex
index 11362fad..13548059 100644
--- a/talk/basicconcepts/coresyntax.tex
+++ b/talk/basicconcepts/coresyntax.tex
@@ -173,12 +173,12 @@
         #include <stdfloat> // may define these:
 
         std::float16_t  = 3.14f16;  // 16 (1+5+10) bit float
-        std::float32_t  = 3.14f32;  // like float
+        std::float32_t  = 3.14f32;  // like float (1+8+23)
                                     // but different type
-        std::float64_t  = 3.14f64;  // like double
+        std::float64_t  = 3.14f64;  // like double (1+11+52)
                                     // but different type
         std::float128_t = 3.14f128; // 128 (1+15+112) bit float
-        std::bfloat_t   = 3.14bf16; // 16 (1+8+7) bit float
+        std::bfloat16_t = 3.14bf16; // 16 (1+8+7) bit float
 
         // also F16, F32, F64, F128 or BF16 suffix possible
     \end{cppcode*}
diff --git a/talk/morelanguage/copyelision.tex b/talk/morelanguage/copyelision.tex
index adf5bd98..e5fd1917 100644
--- a/talk/morelanguage/copyelision.tex
+++ b/talk/morelanguage/copyelision.tex
@@ -2,7 +2,7 @@
 
 \begin{frame}[fragile]
   \frametitlecpp[17]{Copy elision}
-  \begin{block}{Copy elision}
+  \begin{block}{Where does it take place ?}
     \small
     \begin{cppcode*}{}
       struct Foo { ... };
diff --git a/talk/morelanguage/morestl.tex b/talk/morelanguage/morestl.tex
index 561143fe..e8ee92f5 100644
--- a/talk/morelanguage/morestl.tex
+++ b/talk/morelanguage/morestl.tex
@@ -99,7 +99,7 @@
     \begin{cppcode*}{}
       std::optional<Phone> parse_phone(std::string_view in) {
         if (is_valid_phone(in))
-          return in;   // equiv. to optional<Phone>{in};
+          return in; // equiv. to optional<Phone>{in};
         return {};   // or: return std::nullopt; (empty opt.)
       }
       if (v) {                    // or: v.is_valid()
diff --git a/talk/objectorientation/typecasting.tex b/talk/objectorientation/typecasting.tex
index ede5176f..5b45887f 100644
--- a/talk/objectorientation/typecasting.tex
+++ b/talk/objectorientation/typecasting.tex
@@ -23,7 +23,7 @@
 \begin{frame}[fragile]
   \frametitlecpp[98]{Type casting example}
   \small
-  \begin{exampleblock}{}
+  \begin{exampleblockGB}{Practically}{https://godbolt.org/z/16faqc64s}{\texttt{casting}}
     \begin{cppcode*}{gobble=2}
       struct A{ virtual ~A()=default; } a;
       struct B : A {} b;
@@ -34,9 +34,7 @@
 
       B& f = dynamic_cast<B&>(c); // OK, c is a B
       B& g = dynamic_cast<B&>(a); // throws std::bad_cast
-      B& foo(A& h) {
-        return dynamic_cast<B&>(h);
-      }
+      B& foo(A& h) { return dynamic_cast<B&>(h); }
       B& i = foo(c); // OK, c is a B
 
       B* j = dynamic_cast<B*>(&a); // nullptr. a not a B.
@@ -44,7 +42,7 @@
         // Will not reach this
       }
       \end{cppcode*}
-  \end{exampleblock}
+  \end{exampleblockGB}
 \end{frame}
 
 \begin{frame}[fragile]