In standard LATEX<#151#><#151#>, different fonts (of the same size) are selected
by commands like 10, 11, 12, etc. These
commands, however, select a specific font regardless of surrounding
conditions. E.g., if you write 13 you don't get the `bold
extended' <#152#>series<#152#> of the `sans serif' <#153#>family<#153#> (i.e. <#154#>cmssbx<#154#>), instead you get the `bold extended' <#155#>series<#155#> of
the `roman' <#156#>family<#156#> (i.e. <#157#>cmbx<#157#>). In our
implementation this will be different.
Commands like 14 (or 15) are now implemented to
switch to the wanted <#158#>series<#158#> (or <#159#>family<#159#>, respectively),
but to leave
the other font characteristics untouched. However, this concept has
one drawback in the current LATEX<#160#><#160#> version: commands like
16 might switch to a smaller size but will inherit
other characteristics for the font to use from the environment where
they are used. E.g., a footnote appearing in the scope of a theorem
environment will erroneously be typeset in italic shape. This
problem will vanish in LATEX<#161#><#161#> version 2.10. Until then all font
characteristics in such special circumstances must be reset by hand
using the commands given below. However, this is not necessary if
one uses the `<#162#>oldlfont<#162#>' style option described in
sections~#sec:oldlfont#163> and~#sec:formats#164>.
This option defines the font selection
commands to behave in the same way as they do now in LATEX<#165#><#165#> 2.09.