We have to edit texts in a web page (GTT Google Translator Toolkit) and we use Chrome
We click on a paragraph and the text opens in a textarea, we edit the text and then move to the next paragraph.
(There is NO rich text editor)
When this textarea is open we would like a button in Chrome to display non-printing characters within the textarea like you can in . (spaces and line breaks etc.)
Pressing the button will turn on/off the display of the characters.
some fonts, such as
this are nice