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$<code>(1.2)^2 = 1.44$</code>, <cmd>tfc</cmd> to scale by <code>(1.2)^3 = 1.728</code> and <cmd>tfd</cmd> to
→Font sizes
of commands for that. To increase the font you can use <cmd>tfa</cmd> to scale
the font size by a factor of $1.2$, <cmd>tfb</cmd> to scale by a factor of
scale by <code>(1.2)^4 = 2.074</code>.
To decrease the font size, you can use <cmd>tfx</cmd>
to scale the font by a factor of $<code>0.8$ </code> and <cmd>tfxx</cmd> to scale by a factorof $<code>0.6$</code>. The scale factors can be a function of the current font size and can
be changed by <cmd>definebodyfontenvironment</cmd>.
Font size can be combined with font styles. As a shortcut, you can use
<cmd>bfa</cmd> to get bold font scaled by <code>1.2</code>, <cmd>bfx</cmd> to get a bold fontscaled by <code>0.8 </code> and similar commands for other font styles.
These font size switches are meant for changing the font size of a few
