### 31.5 Understanding how CSS affects other options

The choice to use CSS changes the behavior of certain other options. Be aware of the following:

Using CSS changes some default values

Not using CSS changes other default values.

Using CSS changes some default values

When UseCSS=Yes, default values are reversed for the [Graphics] and [HtmlOptions] settings listed in Table 31-2. This removes most HTML that can interfere with CSS settings.

Not using CSS changes other default values

When UseCSS=No, default values are reversed for the [CSS] settings listed in Table 31-2.

Table 31-2 CSS-dependent default values of options

Section | Option | Default value of option when: | Ref.
UseCSS=Yes | UseCSS=No
    [CSS]
    LinkClassIsParaClass
| Yes | No | 28.2.2.2
    NoClassLists
| No | Yes | 30.11.2.5
    WriteClassAttributes
| Yes | No | 31.4.1
    WriteCssStylesheet
| Once | Never | 31.4.1
    WriteCssLink
| Yes | No | 31.4.1
    XrefFormatIsXrefClass
| Yes | No | 31.7.7
    [HtmlOptions]
    AlignAttributes
| No | Yes | 30.4
    Basefont
| No | Yes |
    NoFonts
| Yes | No |

Previous Topic: 31.4.4 Understanding effects of the older Stylesheet setting

Next Topic: 31.6 Linking to alternate CSS files

Parent Topic: 31. Setting up CSS for HTML

Sibling Topics:

31.1 Deciding whether to use CSS

31.2 Understanding how to use CSS

31.3 Understanding how DITA2Go generates CSS

31.4 Specifying CSS file and link options

31.6 Linking to alternate CSS files

31.7 Assigning CSS classes

31.8 Customizing CSS properties