Errors and parts of the text that need correction in a written writing may sometimes be better noticed by printing out the text in the editor and making notes and markings on paper. In this case, the printout will not contain any particulars at all, but just the text with minimum styling.
A logged-in user can do reviewing on writings by going to the works page displaying a writing (or a collection of writings) and pressing the Shift key to enter edit mode. This allows you to immediately type (in red) and strike-out text (by holding down the left mouse button and swiping over the text). To erase the markings made, hold down the Ctrl key and mark the area to be erased with the mouse. Press the Shift key a second time to exit edit mode. These entries are not saved anywhere, so reloading the page will reset the situation.