Set encoding

In Options menu click Encoding. Encoding dialog will be showed

Select encoding. Press Ok button.

Here is several buttons :

Ok button
Sets the selected encoding
Cancel
Closes the dialog without action
Default
Selects the default encoding
Select
Opens the menu of encoding grouped in categories. Hide menu items hides this menu. After selecting of menu item appropriate encoding will be selected

Also you can type name of encoding in the text field for fast selecting

The selected encoding will be used for opening and saving operations. You can reload or save the file when necessary. The selected encoding will be saved in program options and established in next start of program