We provide a few font changing commands based on the role that text plays. Many people want to use a different type face for terms the first time they are used or defined; use the \dfont command for this. By default, this gives bold type; to change it, say to italics, insert the following command after the \input bookmacros line:

\def\dfont{\it}

To emphasize a word or phrase, use the \em command. By default, this gives italics, but it is easy to change. For example, if you want to use bold face for emphasis, insert the following definition after you \input the macros file:

\def\em{\bf}

You may want to use the same type face for definitions and emphasis. In such cases, it is useful to use a different type face for definitions in the midst of emphasized text. For example, you might do this:

\def\em{\it\let\dfont\rm}

With this definition, in the midst of emphasized text, defined terms will stand out. Because of this redefinition of \dfont, you must use the \em command like this:

To {\em emphasize\/} a word or phrase

not like this:

To \em emphasize\/\rm a word or phrase

because the second usage will not restore \dfont to its proper definition. (The first method is also the preferred $\TeX$ nical style.)

Since chapters always start on odd numbered pages, there sometimes will be a blank page preceding the first page of a chapter. These pages normally will be printed; to suppress the blank pages, include the following definition in your file before you input the macros:

\def\printblankpages{false}

If you intend to print the pdf file and bind it or keep it in a binder of some sort, you may want the inner margin to be slightly bigger than the outer margin. To do this, include the following definition in your file before you input the macros:

\def\boundoutput{true}

If the pdf will be read on-screen, it can be annoying for the margins to jump around, so the default is for both margins to be the same.