>>Hi everybody,
>>
>>I have a document with many changes in yellow color. However, when I try to use Accept Changes button I have a dialog - the document contains no tracking changes.
>>
>>Does it mean I would have to apply each change manually?
>>
>>Thanks in advance.
>
>It is also possible that somebody just highlighted parts of the document, by changing the background color.

Yes, I just asked him to accept changes from his side, so he sent me corrected version with these comments:

attached. changes applied. please double check.

[format painter (Word Paintbrush) is a good tool for fixing formatting in Word;
F4 is useful for "repeat last edit/change".]