By Raymond Seroul
The final twenty years have witnessed a revolution within the realm of typography, with the digital disappearance of hot-lead typesetting in desire of the so-called electronic typesetting. the primary in the back of the hot know-how is straightforward: think a really wonderful mesh superimposed on a sheet of paper. electronic typesetting is composed in darkening the correct pixels (tiny squares) of this mesh, in styles comparable to each one personality and image of the textual content being set. the particular darkening is finished via a few printing machine, say a laser printer or phototypesetter, which needs to be instructed precisely the place the ink may still cross. because the mesh is especially fine-the dashes surrounding this sentence are a few six pixels thick, and greater than two hundred pixels long-the printer can purely be managed via a working laptop or computer application, which takes a "high-level" description of the web page by way of textual content, fonts, and formatting instructions, and digests all of that into "low-level" instructions for the printer. TEX is this sort of application, created by way of Donald E. Knuth, a working laptop or computer scientist at Stanford University.
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Additional resources for A Beginner’s Book of TEX
Here are some more examples of PostScript font registering: \font\tenpalatino=Palatino at 10pt \font\bighelvetica=Helvetica at 30pt One last thing: each scaled version of a font must be registered separately. For example, saying \font\twelvebf=cmrl0 at 12pt does not entitle you to use cmrl0 at the design size of 10 pt. In other words, a font registration command associates with a control sequence a pair (file name, scaling factor), and that pair only. 6 Global scaling The next command isn't, properly speaking, a font command: it allows you to magnify or shrink a whole document.
You must define a name to refer to that font-"register" it with TEX, so to speakand also tell TEX where to find information about it. Information about each font is The fonts Tc>< uses 29 kept in a special file somewhere on your computer system; for Computer Modem Roman at 8 point, this file is called emr8. ) Once the registration formalities are over, T£X will treat the newly defined \eightrm just like the predefined names of the previous section: He had a great big head on an average body, and short, spindly legs.
The pair \bgroup and \egroup are just new names for braces. This means you can replace an open brace by a \bgroup and a close brace by an \egroup, if you feel like it. This in itself is not very useful, until you find yourself trying to define a macro that has unbalanced braces inside. ) The other pair, \begingroup and \endgroup, is not synonymous with braces: a group starting with \begingroup must end with \endgroup. Why this distinction? Because it allows one to build mechanisms to check for errors much more thoroughly than can be done in plain T]jX.
A Beginner’s Book of TEX by Raymond Seroul