diff --git a/courses/comprehensive_rust_training/080_pattern_matching/05_exercise.rst b/courses/comprehensive_rust_training/080_pattern_matching/05_exercise.rst
index 536f6be95..82759b289 100644
--- a/courses/comprehensive_rust_training/080_pattern_matching/05_exercise.rst
+++ b/courses/comprehensive_rust_training/080_pattern_matching/05_exercise.rst
@@ -11,37 +11,14 @@ Let's write a simple recursive evaluator for arithmetic expressions.
 An example of a small arithmetic expression could be :rust:`10 + 20`, which
 evaluates to :rust:`30`. We can represent the expression as a tree:
 
-.. code:: bob
-
-               .-------.
-       .------ |   +   | ------.
-       |       '-------'       |
-       v                       v
-   .--------.              .--------.
-   |   10   |              |   20   |
-   '--------'              '--------'
+.. image:: comprehensive_rust_training/pattern_matching_exercise_1.svg
+   :width: 40%
 
 A bigger and more complex expression would be
 :rust:`(10 * 9) + ((3 - 4) * 5)`, which evaluate to :rust:`85`. We represent
 this as a much bigger tree:
 
-.. code:: bob
-
-                                 .-----.
-               .---------------- |  +  | ----------------.
-               |                 '-----'                 |
-               v                                         v
-            .-----.                                   .-----.
-      .---- |  *  | ----.                       .---- |  *  | ----.
-      |     '-----'     |                       |     '-----'     |
-      v                 v                       v                 v
-   .------.          .-----.                 .-----.           .-----.
-   |  10  |          |  9  |           .---- |  "-"| ----.     |  5  |
-   '------'          '-----'           |     '-----'     |     '-----'
-                                       v                 v
-                                    .-----.           .-----.
-                                    |  3  |           |  4  |
-                                    '-----'           '-----'
+.. image:: comprehensive_rust_training/pattern_matching_exercise_2.svg
 
 In code, we will represent the tree with two types:
 
diff --git a/courses/comprehensive_rust_training/130_memory_management/01_review.rst b/courses/comprehensive_rust_training/130_memory_management/01_review.rst
index a50686cf0..d41ecefad 100644
--- a/courses/comprehensive_rust_training/130_memory_management/01_review.rst
+++ b/courses/comprehensive_rust_training/130_memory_management/01_review.rst
@@ -34,19 +34,7 @@ dynamically sized data, the actual string, on the heap:
        let s1 = String::from("Hello");
    }
 
-.. code:: bob
-
-    Stack
-   .- - - - - - - - - - - - - -.      Heap
-   :                           :     .- - - - - - - - - - - - - - - -.
-   :    s1                     :     :                               :
-   :   +-----------+-------+   :     :                               :
-   :   | capacity  |     5 |   :     :   +----+----+----+----+----+  :
-   :   | ptr       |     o-+---+-----+-->| H  | e  | l  | l  | o  |  :
-   :   | len       |     5 |   :     :   +----+----+----+----+----+  :
-   :   +-----------+-------+   :     :                               :
-   :                           :     :                               :
-   `- - - - - - - - - - - - - -'     `- - - - - - - - - - - - - - - -'
+.. image:: comprehensive_rust_training/review_of_program_memory.svg
 
 ---------
 Details
diff --git a/courses/comprehensive_rust_training/130_memory_management/04_move.rst b/courses/comprehensive_rust_training/130_memory_management/04_move.rst
index 1083b3ca2..971b027a7 100644
--- a/courses/comprehensive_rust_training/130_memory_management/04_move.rst
+++ b/courses/comprehensive_rust_training/130_memory_management/04_move.rst
@@ -11,7 +11,7 @@ An assignment will transfer *ownership* between variables:
 .. code:: rust
 
    fn main() {
-       let s1: String = String::from("Hello!");
+       let s1: String = String::from("Hello");
        let s2: String = s1;
        println!("s2: {s2}");
        // println!("s1: {s1}");
@@ -24,43 +24,11 @@ An assignment will transfer *ownership* between variables:
 
 Before move to :rust:`s2`:
 
-.. code:: bob
-
-    Stack                             Heap
-   .- - - - - - - - - - - - - -.     .- - - - - - - - - - - - - - - - - - -.
-   :                           :     :                                     :
-   :    s1                     :     :                                     :
-   :   +-----------+-------+   :     :   +----+----+----+----+----+----+   :
-   :   | ptr       |   o---+---+-----+-->| H  | e  | l  | l  | o  | !  |   :
-   :   | len       |     6 |   :     :   +----+----+----+----+----+----+   :
-   :   | capacity  |     6 |   :     :                                     :
-   :   +-----------+-------+   :     :                                     :
-   :                           :     `- - - - - - - - - - - - - - - - - - -'
-   :                           :
-   `- - - - - - - - - - - - - -'
+.. image:: comprehensive_rust_training/review_of_program_memory.svg
 
 After move to :rust:`s2`:
 
-.. code:: bob
-
-    Stack                             Heap
-   .- - - - - - - - - - - - - -.     .- - - - - - - - - - - - - - - - - - -.
-   :                           :     :                                     :
-   :    s1 "(inaccessible)"    :     :                                     :
-   :   +-----------+-------+   :     :   +----+----+----+----+----+----+   :
-   :   | ptr       |   o---+---+--+--+-->| H  | e  | l  | l  | o  | !  |   :
-   :   | len       |     6 |   :  |  :   +----+----+----+----+----+----+   :
-   :   | capacity  |     6 |   :  |  :                                     :
-   :   +-----------+-------+   :  |  :                                     :
-   :                           :  |  `- - - - - - - - - - - - - - - - - - -'
-   :    s2                     :  |
-   :   +-----------+-------+   :  |
-   :   | ptr       |   o---+---+--'
-   :   | len       |     6 |   :
-   :   | capacity  |     6 |   :
-   :   +-----------+-------+   :
-   :                           :
-   `- - - - - - - - - - - - - -'
+.. image:: comprehensive_rust_training/move_semantics_2.svg
 
 When you pass a value to a function, the value is assigned to the
 function parameter. This transfers ownership:
@@ -109,6 +77,10 @@ In the :rust:`say_hello` example:
    making move semantics the default, and by forcing programmers to make
    clones explicit.
 
+=================
+More to Explore
+=================
+
 --------------------------------
 Defensive Copies in Modern C++
 --------------------------------
@@ -117,7 +89,7 @@ Modern C++ solves this differently:
 
 .. code:: cpp
 
-   std::string s1 = "Cpp";
+   std::string s1 = "Hello";
    std::string s2 = s1;  // Duplicate the data in s1.
 
 -  The heap data from :rust:`s1` is duplicated and :rust:`s2` gets its own
@@ -127,42 +99,11 @@ Modern C++ solves this differently:
 
 Before copy-assignment:
 
-.. code:: bob
-
-    Stack                             Heap
-   .- - - - - - - - - - - - - -.     .- - - - - - - - - - - -.
-   :                           :     :                       :
-   :    s1                     :     :                       :
-   :   +-----------+-------+   :     :   +----+----+----+    :
-   :   | ptr       |   o---+---+--+--+-->| C  | p  | p  |    :
-   :   | len       |     3 |   :     :   +----+----+----+    :
-   :   | capacity  |     3 |   :     :                       :
-   :   +-----------+-------+   :     :                       :
-   :                           :     `- - - - - - - - - - - -'
-   `- - - - - - - - - - - - - -'
+.. image:: comprehensive_rust_training/review_of_program_memory.svg
 
 After copy-assignment:
 
-.. code:: bob
-
-    Stack                             Heap
-   .- - - - - - - - - - - - - -.     .- - - - - - - - - - - -.
-   :                           :     :                       :
-   :    s1                     :     :                       :
-   :   +-----------+-------+   :     :   +----+----+----+    :
-   :   | ptr       |   o---+---+--+--+-->| C  | p  | p  |    :
-   :   | len       |     3 |   :     :   +----+----+----+    :
-   :   | capacity  |     3 |   :     :                       :
-   :   +-----------+-------+   :     :                       :
-   :                           :     :                       :
-   :    s2                     :     :                       :
-   :   +-----------+-------+   :     :   +----+----+----+    :
-   :   | ptr       |   o---+---+-----+-->| C  | p  | p  |    :
-   :   | len       |     3 |   :     :   +----+----+----+    :
-   :   | capacity  |     3 |   :     :                       :
-   :   +-----------+-------+   :     :                       :
-   :                           :     `- - - - - - - - - - - -'
-   `- - - - - - - - - - - - - -'
+.. image:: comprehensive_rust_training/copy_assignment_2.svg
 
 Key points:
 
diff --git a/courses/comprehensive_rust_training/140_smart_pointers/01_box.rst b/courses/comprehensive_rust_training/140_smart_pointers/01_box.rst
index 470a8470a..96b8e3503 100644
--- a/courses/comprehensive_rust_training/140_smart_pointers/01_box.rst
+++ b/courses/comprehensive_rust_training/140_smart_pointers/01_box.rst
@@ -16,18 +16,8 @@ owned pointer to data on the heap:
        println!("five: {}", *five);
    }
 
-.. code:: bob
-
-    Stack                     Heap
-   .- - - - - - -.     .- - - - - - -.
-   :             :     :             :
-   :    five     :     :             :
-   :   +-----+   :     :   +-----+   :
-   :   | o---|---+-----+-->|  5  |   :
-   :   +-----+   :     :   +-----+   :
-   :             :     :             :
-   :             :     :             :
-   `- - - - - - -'     `- - - - - - -'
+.. image:: comprehensive_rust_training/smart_pointers_box_1.svg
+   :width: 50%
 
 :rust:`Box<T>` implements :rust:`Deref<Target = T>`, which means that you can
 :url:`call methods from T directly on a Box<T> <https://doc.rust-lang.org/std/ops/trait.Deref.html#more-on-deref-coercion>`.
@@ -52,18 +42,7 @@ indirection:
        println!("{list:?}");
    }
 
-.. code:: bob
-
-    Stack                           Heap
-   .- - - - - - - - - - - - - - .     .- - - - - - - - - - - - - - - - - - - - - - - - -.
-   :                            :     :                                                 :
-   :    list                    :     :                                                 :
-   :   +---------+----+----+    :     :    +---------+----+----+    +------+----+----+  :
-   :   | Element | 1  | o--+----+-----+--->| Element | 2  | o--+--->| Nil  | // | // |  :
-   :   +---------+----+----+    :     :    +---------+----+----+    +------+----+----+  :
-   :                            :     :                                                 :
-   :                            :     :                                                 :
-   '- - - - - - - - - - - - - - '     '- - - - - - - - - - - - - - - - - - - - - - - - -'
+.. image:: comprehensive_rust_training/smart_pointers_box_2.svg
 
 ---------
 Details
diff --git a/courses/comprehensive_rust_training/140_smart_pointers/03_trait_objects.rst b/courses/comprehensive_rust_training/140_smart_pointers/03_trait_objects.rst
index a0ba50829..5af485a78 100644
--- a/courses/comprehensive_rust_training/140_smart_pointers/03_trait_objects.rst
+++ b/courses/comprehensive_rust_training/140_smart_pointers/03_trait_objects.rst
@@ -48,37 +48,7 @@ like :rust:`Box` to create an owned trait object: :rust:`Box<dyn Pet>`.
 
 Memory layout after allocating :rust:`pets`:
 
-.. code:: bob
-
-    Stack                             Heap
-   .- - - - - - - - - - - - - - - -.     .- - - - - - - - - - - - - - - - - - - - - - -.
-   :                               :     :                                             :
-   :    "pets: Vec<Box<dyn Pet>>"  :     :   "data: Cat"         +----+----+----+----+ :
-   :   +-----------+-------+       :     :  +-------+-------+    | F  | i  | d  | o  | :
-   :   | ptr       |   o---+-------+--.  :  | lives |     9 |    +----+----+----+----+ :
-   :   | len       |     2 |       :  |  :  +-------+-------+      ^                   :
-   :   | capacity  |     2 |       :  |  :       ^                 |                   :
-   :   +-----------+-------+       :  |  :       |                 '-------.           :
-   :                               :  |  :       |               data:"Dog"|           :
-   :                               :  |  :       |              +-------+--|-------+   :
-   `- - - - - - - - - - - - - - - -'  |  :   +---|-+-----+      | name  |  o, 4, 4 |   :
-                                      `--+-->| o o | o o-|----->| age   |        5 |   :
-                                         :   +-|---+-|---+      +-------+----------+   :
-                                         :     |     |                                 :
-                                         `- - -| - - |- - - - - - - - - - - - - - - - -'
-                                               |     |
-                                               |     |                      "Program text"
-                                         .- - -| - - |- - - - - - - - - - - - - - - - -.
-                                         :     |     |       vtable                    :
-                                         :     |     |      +----------------------+   :
-                                         :     |     `----->| "<Dog as Pet>::talk" |   :
-                                         :     |            +----------------------+   :
-                                         :     |             vtable                    :
-                                         :     |            +----------------------+   :
-                                         :     '----------->| "<Cat as Pet>::talk" |   :
-                                         :                  +----------------------+   :
-                                         :                                             :
-                                         '- - - - - - - - - - - - - - - - - - - - - - -'
+.. image:: comprehensive_rust_training/smart_pointers_owned_objects.svg
 
 ---------
 Details
diff --git a/images/comprehensive_rust_training/copy_assignment_2.svg b/images/comprehensive_rust_training/copy_assignment_2.svg
new file mode 100644
index 000000000..1e580a7dc
--- /dev/null
+++ b/images/comprehensive_rust_training/copy_assignment_2.svg
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