diff --git a/doc/en/entity-properties.md b/doc/en/entity-properties.md
new file mode 100644
index 00000000..4b4a3500
--- /dev/null
+++ b/doc/en/entity-properties.md
@@ -0,0 +1,101 @@
+# Entity properties
+
+## Logic
+
+### *components*
+
+Defines components and the order in which they are initialized.
+
+```json
+"components": [
+    list of components
+]
+```
+
+Example:
+
+```json
+"components": [
+    "base:drop"
+]
+```
+
+The components code should be in `scripts/components`.
+
+## Physics
+
+### *hitbox*
+
+An array of three numbers indicating the size of the entity's hitbox.
+
+Example:
+
+```json
+"hitbox": [0.6, 1.8, 0.6]
+```
+
+
+### *body-type*
+
+Determines how the physics engine will work with it.
+
+- *dynamic* - default type. The physics engine calculates movement and collisions.
+- *kinematic* - only movement is calculated, without collisions.
+
+### *blocking*
+
+Determines whether the entity blocks installation of blocks.
+
+*In the future will also block other entities movement.*
+
+Default value: *true*.
+
+### *sensors*
+
+A sensor is an area attached to a physical body that detects the entry of other bodies into it.
+
+- When a body enter, the *on_sensor_enter* event is triggered.
+- When a body exit, the *on_sensor_exit* event is called.
+
+Sensors are indexed in the same order as they are presented in the list, starting from 0.
+
+The following types (shapes) of sensors exist:
+- *radius* is the simplest sensor. Defines the area around the center of the hitbox. The following values ​​are specified:
+    - radius - number.
+- *aabb* - a rectangular area that changes position depending on the rotation of the entity. **The area itself does not rotate.** The following values ​​are specified:
+    - three numbers x, y, z of the minimal corner of the area.
+    - three numbers x, y, z of the opposite corner of the area.
+
+Example:
+
+```json
+"sensors": [
+    ["aabb", -0.2, -0.2, -0.2, 0.2, 0.2, 0.2],
+    ["radius", 1.6]
+]
+```
+
+0. A rectangular area with a width, height and length of 0.4 m, centered at 0.0.
+1. Radial area with a radius of 1.6 m.
+
+## View
+
+### *skeleton-name*
+
+The default value is the same as the entity name. Determines which skeleton will be used by the entity. See [rigging](rigging.md).
+
+## Saving/Loading
+
+In addition to custom components, the engine automatically saves data from the built-in ones: transform, rigidbody, skeleton.
+
+There is a set of flags that allow you to specify which data will be saved and which will not.
+
+(Boolean values ​​are specified)
+
+| Title                  | Goal                                                 | Default |
+| ---------------------- | ---------------------------------------------------- | ------- |
+| save                   | the entity itself                                    | true    |
+| save-skeleton-pose     | skeleton pose                                        | false   |
+| save-skeleton-textures | dynamically assigned textures                        | false   |
+| save-body-velocity     | body velocity                                        | true    |
+| save-body-settings     | changed body settings <br>(type, damping, crouching) | false   |
diff --git a/doc/ru/entity-properties.md b/doc/ru/entity-properties.md
index bb158331..9c68c3ab 100644
--- a/doc/ru/entity-properties.md
+++ b/doc/ru/entity-properties.md
@@ -8,7 +8,7 @@
 
 ```json
 "components": [
-	список компонентов
+    список компонентов
 ]
 ```
 
@@ -16,7 +16,7 @@
 
 ```json
 "components": [
-	"base:drop"
+    "base:drop"
 ]
 ```
 
@@ -61,17 +61,17 @@
 
 Существуют следующие типы (формы) сенсоров:
 - radius (радиус) - самый простой сенсор. Определяет область вокруг центра хитбокса. Указываются следующие значения:
-	- радиус - число.
+    - радиус - число.
 - aabb (коробка) - прямоугольная область, меняющая положение в зависимости от поворота сущности. **Сама область не поворачивается.** Указываются следующие значения:
-	- три числа x, y, z минимального угла области.
-	- три числа x, y, z противоположного угла области.
+    - три числа x, y, z минимального угла области.
+    - три числа x, y, z противоположного угла области.
 
 Пример:
 
 ```json
 "sensors": [
-	["aabb", -0.2, -0.2, -0.2, 0.2, 0.2, 0.2],
-	["radius", 1.6]
+    ["aabb", -0.2, -0.2, -0.2, 0.2, 0.2, 0.2],
+    ["radius", 1.6]
 ]
 ```
 
@@ -86,7 +86,7 @@
 
 ## Сохранение/загрузка
 
-Кроме данных пользовательских компонентов, движок автоматически сохраняет данные встроенных: transform, rigidbody, modeltree.
+Кроме данных пользовательских компонентов, движок автоматически сохраняет данные встроенных: transform, rigidbody, skeleton.
 
 Есть набор флагов, позволяющих указать какие данные будут сохранены, а какие нет.