funzt. Danke

@Claudia-Svenson said:

Assume I open a new, empty file with file encoding ANSI.

I type some german text which contains Umlaute like äöü

Later I decide to switch the file encoding to UTF-8 by clicking on menu

Encoding—>UTF-8 BOM

Yes, the file encoding is now UTF-8 BOM.

But the Umlaute äöü appear now as
xE4 xF6 xFC (with black background)

How can I tell NP++ to automatically convert all Umlaute to the corresponding UTF-8 bytes when switching file encoding from ANSI to UTF-8?

If this is not possible automatically:
How can I mark the text and do it manually?

Use the bottom section of the Encoding menu, e.g, Convert to UTF-8-BOM, when you want to convert.

There are usually only two times you should use the top section:

• when you have a completely empty new file and you want to change from the default encoding to something else before you start adding text;

• when you have just opened a file and the encoding Notepad++ determined it to be is wrong, so you want to change it and have Notepad++ reread the file as a different encoding.