| symbol | Insert an em-quadrat. |
| symbol | Dele, take out; expunge. |
| symbol | Insert space. |
| symbol | Less space. |
| symbol | Close up entirely. |
| symbol | Dele some type, and insert a space in lieu of what is removed. |
| symbol | Dele some type, and close up. |
| symbol | Broken or battered type. |
| symbol | Plane down a letter. Push down a space or quadrat. |
| . . . . | Placed under erased words, restores them. |
| symbol | Written in the margin, restores a canceled word or passage, or such portions of erased text as have dots under them. |
| symbol | Begin paragraph. |
| symbol | Remove to left. |
| symbol | Remove to right. |
| symbol | Carry higher up on page. |
| symbol | Carry down. |
| symbol | Four lines subscript, denote italic capitals. |
| symbol | Three lines subscript, denote capitals. |
| symbol | Two lines subscript, denote small capitals. |
| symbol | One line subscript, denotes italics. |
| symbol | Wrong font. |
| symbol | Transpose. |
| symbol | Period. |
| symbol | Colon. |
| symbol | Apostrophe. |
| =/ | Hyphen. |
| –/ | En-dash. |
| |—| | Em-dash. |
| If there is an omission (an “out”) make a caret at the place of the out, and if the out is short, write the omitted word or words in margin; if long, write in margin “out—see copy,” and pin to the proof the sheet of copy containing the omitted portion. | |
| symbol | Lower-case. |
| symbol | Small capitals. |
| symbol or symbol or symbol | calls attention to some doubtful word or sentence. |
Several other marks are used, which need no explanation.
In order to show our readers the practical application of the above marks, we will suppose the following paragraph from Guizot to be put in type abounding in errors, and will then exhibit the corrections as made by the proof-reader: