updated info about the block function (#3581)

site/content/en/docs/manual/advanced/ai-tools.md

@@ -35,8 +35,8 @@ A list of available out-of-the-box interactors is placed below.
   If you are not satisfied with the result, you can set additional points or remove points.
   To delete a point, hover over the point you want to delete, if the point can be deleted,
   it will enlarge and the cursor will turn into a cross, then left-click on the point.
-  If you want to postpone the request and create a few more points, hold down `Ctrl` and continue,
+  If you want to postpone the request and create a few more points, hold down `Ctrl` and continue (the `Block`
-  the request will be sent after the key is released.
+  button on the top panel will turn blue), the request will be sent after the key is released.
 
   ![](/images/image188_detrac.jpg)
 

site/content/en/docs/manual/advanced/opencv-tools.md

@@ -37,6 +37,10 @@ displayed as a red square which is tied to the cursor.
   Increasing action threshold will affect the performance.
   During the drawing process you can remove the last point by clicking on it with the left mouse button.
 
+- You can also create a boundary manually (like when 
+  [creating a polygon](/docs/manual/advanced/annotation-with-polygons/manual-drawing/)) by temporarily disabling 
+  the automatic line creation. To do that, switch blocking on by pressing `Ctrl`.
+
 - In the process of drawing, you can select the number of points in the polygon using the switch.
 
   ![](/images/image224.jpg)

site/content/en/docs/manual/basics/top-panel.md

@@ -52,6 +52,17 @@ Used to complete the creation of the object. This button appears only when the o
 
 ---
 
+## Block
+
+![](/images/image226.jpg)
+
+Used to pause automatic line creation when drawing a polygon with 
+[OpenCV Intelligent scissors](/docs/manual/advanced/opencv-tools/#intelligent-scissors).
+Also used to postpone server requests when creating an object using [AI Tools](/docs/manual/advanced/ai-tools/).
+When blocking is activated, the button turns blue.
+
+---
+
 ## Player
 
 Go to the first /the latest frames.