Two lines put under a letter typically indicates that the letter is meant to be italicized or underlined. It serves as a formatting instruction for the typesetter or printer, highlighting how the letter should be styled in the final published document.
When proofreading, those three dashes mean capitalize the letter.
SP stands for "spelling error" when proofreading. It indicates that there is a mistake related to the spelling of a word that needs to be corrected.
Lower Case
Proofreading and editing.
Lower Case
Proofreading means to read something & mark corrections in it. It could also be called editing. ChaCha on!
If you mean the letter x, it has four lines of symmetry.
"ZIP" in proofreading marks indicates a passage is fine and should not be changed. It is used to show that no edits are needed in that particular section.
two lines that never touch that above and under or sideways
Traction control
The backslash proofreading symbol is used to indicate a space that should be deleted, especially in typesetting or formatting work. It signifies that the space preceding the backslash should be removed to ensure proper formatting and alignment of the text.
A hypothesis is a proposed explanation or prediction based on limited evidence. It is used in scientific research to guide experiments and observations in order to test its validity.