E
earpiece
Ad position in the top corner of a newspaper front page, either side of the masthead.
editorial
(1) The editor's column.
(2) Any page under the control of the editorial team.
ellipsis
The … character, indicating that words are missing (eg from a quote).
em, en
A measure of horizontal space, the width of a lower-case m or n. An 'em-dash' is the style of dash often used between phrases, and is wider than a hyphen or 'en-dash'.
F
facing editorial
Advertising page next to an editorial page, which can attract a higher rate because (supposedly) it gets more readers.
flannel panel
List of staff and contributors, often found on the editorial page.
flatplan
A one-page plan with boxes representing all the pages of the magazine. Each box has a short description of the content of the page. Used to plan the order of the content. Download a flatplan template from this article on magazine planning.
folio
Pages or page numbers.
footer
Line of text within the bottom margin of the page, often containing the publication title and cover date.

A 'full bleed' magazine cover. Read Automotive at Magcloud.com.
full bleed
Picture which entirely covers a page or DPS.
G
gatefold
A cover which folds back on itself to provide a fold-out flap.
graph
(US) A paragraph
gsm
Grams per square metre, a measure of paper weight; standard A4 copier paper is usually 80gsm, thick cover stock for magazines might be 150gsm or more.
gutter
Blank area between columns of type.
H
H&Js
Hyphenation and justification - the settings for controlling the automatic hyphenation and line-justification systems in a page layout application.
house ad
Ads for the magazine itself (eg subscription offers, reader services, events) or other titles from the same publisher.
I
imagesetter
High-resolution printer used for outputting film in CTF printing
imposition
Arrangement of pages on a full-size sheet or web, often 16 or 32 at a time
indent
The offset of the first line in a paragraph relative to the rest of the paragraph; a 'hanging indent' has the first line offset to the left of the rest
InDesign
Adobe page layout software, which took over from QuarkXPress as the most common desktop publishing application for professional work.
IBC
Inside back cover - the last right-hand page in a magazine.
IFC
Inside front cover - the first left-hand page in a magazine.