What are non-printing characters ? What are the different marks that Writer uses for displaying non printing characters ?

Non-printing characters are those special characters which do not appear on paper when we print the document. They are often useful to see when we are working with heavily formatted documents and need to keep track of our tabs, spaces, blank lines and so on.

The Writer uses the following marks for the corresponding non-printing characters:

1. Enter key — ( ¶ )
2. Spacebar key — ( . )
3. Tab key — ( → )