You can check the words with uncertain characters from the Check Spelling dialog box (Tools>Check Spelling…).
In this dialog box, you can choose to apply (or reject) the suggested changes either to the current occurrence or to all the occurrences of a word in the text.
- Click Ignore to skip the word without making changes.
The highlighting will be removed.
- Click Replace to replace the word with one of the suggested corrections.
- Click Add… to place the selected word into the dictionary.
At next use, this word will not be treated as an error.
For details, see User Dictionary: Adding and Removing Words.
Tip. To customize spell checking, click the Settings… button in the Check Spelling dialog box.
For character-based languages, the program will suggest similar-looking characters when a direct match is unclear.