diff --git a/Documentation.md b/Documentation.md
index 24bcb08..ab5ce1b 100644
--- a/Documentation.md
+++ b/Documentation.md
@@ -48,8 +48,7 @@ All setting are stored in `CryptoNotepad.settings` file. It will be created afte
 
 ## Settings
 
-### Editor
-
+### Main // Editor
 | Parameter | Description |
 | ------ | ------ |
 | Font name | Editor font |
@@ -57,6 +56,20 @@ All setting are stored in `CryptoNotepad.settings` file. It will be created afte
 | Font color | Editor font color |
 | Background color | Editor background color |
 | Highlights color | Color used to highlight text while searching in the editor|
+| Insert key | Enable/Disable **Ins** key functionality|
+
+### Main // Line Numbers
+| Parameter | Description |
+| ------ | ------ |
+| Visible | Show/Hide line numbers in editor|
+| Background color | Set up background color of line number panel|
+| Font color | Set up font color of line number panel|
+| Show border lines | Display borders across line number panel ![](https://i.imgur.com/sJ41swG.png)|
+| Border lines color | Set up border line color|
+| Border lines style | Set up border line style, eg Solid/Dash/Dot/DashDot/DashDotDot|
+| Show grid lines | Display grid lines ![](https://i.imgur.com/iDe1Re6.png)|
+| Grid lines color | Set up grid line color|
+| Grid lines style | Set up grid line style, eg Solid/Dash/Dot/DashDot/DashDotDot|
 
 ### Application
 
@@ -84,8 +97,15 @@ All setting are stored in `CryptoNotepad.settings` file. It will be created afte
 | Key size | Can be either 128/192/256 |
 | Password iterations | How many times the algorithm is executed on the text |
 
+### FAQ
+* Where is the tab support? Why [#4](https://github.com/Crypto-Notepad/Crypto-Notepad/issues/4) issue does not implementing for a very long time?
+<br>`The project was originally planned without the tabs support, and at this stage of development, it is very difficult to implement this feature. Therefore, the development of this feature has been suspended so far.`
+* Why is the project being developed very slowly, and new features implemented for a very long time?
+<br>`At this development stage app works well, has rich functionality, and does not have critical bugs or functions that must be implemented ASAP. Therefore, there is no need to release updates frequently.`
+
+
 ## Screenshots
 
 ![main windows](https://i.imgur.com/6Ru5yPS.png)<br>
-![about windows](https://i.imgur.com/4WEAswE.png)<br>
-![settings windows](https://i.imgur.com/2xGhYCx.png)
+![about windows](https://i.imgur.com/F9ymmnd.png)<br>
+![settings windows](https://i.imgur.com/7Ly3gzn.png)