1. The margin is the space around the printed or written matter on a page.
The column is a vertical row or list.
The module is a separable component, frequently one that is interchangeable with others, for assembly into units of differing size, or function.
The gutter is the white space formed by the inner margins of two facing pages in a bound book, magazine, or newspaper.
The folio is the number of each page.

2. Multiple-column grids contain several spatial intervals, which provide endless compositional options.
They are flexible and accommodate a range of visual elements.
Multiple-column grids are suitable for complex projects, including books, magazines, and publications that contain diverse content. The quantity of textual and visual content, as well as the page format, will help the designer determine the ideal number of intervals.

3.Most of the fonts you'll use on your Mac are proportional; that is, the characters each take up a proportional amount of space-a typical letter i takes up about one-fifth the space of the letter m. So you no longer need extra spaces to separate the sentences

4. A character a mark, symbol, or sign, including letterforms and numbers, in language systems.

5. Characters should be used when necessary and not by amount of line length or words per line.

6. A typographic river is a series of inconsistent word spaces that creates distracting open lines running vertically through the justified paragraph.

7. A flow line is a horizontal measure that divides the page into spatial divisions and creates additional alignment points for the placement of the visual elements.

8. Allowing some white space into a design allows the composition to "breathe" enough so it doesn't appear overwhelmed or over designed. You can incorporate white space into your designs by following the modular grid.

9. Type color in typographic terms, color refers to the density of typographic elements and their perceived gray value. It is the overall feeling of lightness and darkness on the page.
Typography is just one element of a design, used in combination with images, diagrams, photography and other graphic elements.
Type forms part of a larger visual and informative scheme. The vast array of typefaces available means that type can be used to add a great deal of texture to a design.

10. X-Height is the height of the lowercase letters without ascenders and descenders.

11. Tracking is the typographic technique used to adjust (open and tighten) the overall spacing of words, lines, and paragraphs to improve the readable appearance of text.

12. Kerning is the typographic technique, also known as letterspacing, used to adjust (open and tighten) the slight distances between letters to avoid character collisions, as well as irregular and unwanted spaces.

13. Justification uses three values for type setting: minimum, maximum and optimum values.

14.The optimum spacing between words is as far as the letters need to be spaced out to reach the end of a justified line and still appear to be a legible word.

15. When indicating a new paragraph one can indent using the traditional em spacing to do so. To indicate a new paragraph to a reader, you need to use either extra spacing between the paragraphs or an indent but do not use both.

16. If you have room to add the full word then don't hyphenate. Avoid more than two hyphenations in a row because this looks confusing and unprofessional. Never hyphenate words in a headline.

17. A ligature is a specially designed character produced by combining two or three letters into one unified form.

18. CMYK stands for cyan, magenta, yellow and key (black). These are the four colors of ink used in the traditional method of printing hardcopies of images called offset printing. RGB stands for red, green and blue. The main purpose of the RGB color model is for the sensing, representation, and display of images in electronic systems, such as televisions and computers.

19. The purpose of a hanging punctuation is to hang it off the aligned edge to eliminate any visual interruption of the text.

20. An apostrophe is a punctuation mark used to mark omissions and it assists in marking the possessives of all nouns and many pronouns. A foot mark (') is called "prime" marks, and they are slightly slanted. Inch marks are also known as ditto marks on a typewriter ('').

21. A hyphen is one third of an em rule and is used to link words. It serves as a compound modifier where two words become one, such as 'x-height'; breaks syllables of words in text blocks like geo-graphy; and serves to provide clarity such as re-serve rather than reserve.
An en dash is half of an em rule and is used to separate page numbers, dates and to replace the word 'to' in constructions implying movement.
Em dashes are used to form lines and house nested clauses. A standard, joining em dash can cause spacing issues as it has no side-bearings and fills its bounding box so that it touches the surrounding characters.
A row of these em dashes would form a solid line. Punctuating em dashes are slightly shorter, providing space for surrounding characters to breathe. A row of punctuating em dashes form a punctuated line.

22. A widow is one or two words that are left over at the end of the paragraph, which should be corrected to avoid drawing attention to the extra space. An orphan is the same concept as a widow except there is only one word left over at the end of the paragraph.