A Beginner’s Book of TEX by Raymond Seroul

By Raymond Seroul

The final 20 years have witnessed a revolution within the realm of typography, with the digital disappearance of hot-lead typesetting in prefer of the so-called electronic typesetting. the primary at the back of the recent expertise is easy: think a really high quality mesh superimposed on a sheet of paper. electronic typesetting is composed in darkening the precise pixels (tiny squares) of this mesh, in styles comparable to every one personality and image of the textual content being set. the particular darkening is completed through a few printing gadget, say a laser printer or phototypesetter, which has to be advised precisely the place the ink may still move. 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 basically be managed by means of a working laptop or computer application, which takes a "high-level" description of the web page when it comes to 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 means of Donald E. Knuth, a working laptop or computer scientist at Stanford University.

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The members of family \f am3 are not redefined: extensible symbols figure out their own size from the context. • Font names like \tenrm and family names like \itfam are defined by plain TP( once and for all, and should not be redefined inside \ tenpoint . • The last line of the definition is a call to \rm, so when you type \ tenpoint , you get to-point roman by default. Naturally, you can choose a different default by changing this line. • You can include in the definition of \tenpoint your own font-change commands such as \tm and \frak.

The following construction gives exactly the same result: \font\twelverm=emrl0 scaled 1200 The fonts TEX uses 31 (notice there is no backs lash before scaled or at ). 5 (that is, a reduction by 50%), and so on. 2 = 1440, and so on up to \magstep5. 09545. 2 = You can blow fonts up or down at will as far as Tpc is concerned, since Tpc doesn't know or care anything about fonts except for their dimensions. But you'll run into trouble if the driver program that sends the characters to the printer can't find information about them at the requested magnifications.

Lpt In the example above, then, we could write W\kern -lpt A. 5 pt for this font); • \negthinspace gives minus one-sixth of an em, that is, it pulls the surrounding letters together. Warning: kerns have no elasticity! 2em. Now it can still happen that TBC breaks a line right before a \kern, if there is an \hskip there. In this case TBC will discard the kern as well as the \hskip. How then can you get a horizontal space that is guaranteed never to disappear, no matter what happens? Plain TBC has a macro \hglue that you can use in this case: \hglue 2mm, \hglue 5pt plus 2pt minus 2pt.

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