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2.6.2.1.2. Numbering settings
The "Numbering" tab of the output-configuration dialog allows to edit numbering settings. Each of these settings is described below.

Figure 2.6.8. Output configuration: numbering settings

Render 1st-Level as
Select whether the first section level shall be formatted as book parts or book chapters.
If "book parts" is selected, then the first section level will be formatted as book parts, the second level will be formatted as book chapters and all following levels will be formatted as normal sections.
If "book chapters" is selected, then the first section level will be formatted as book chapters and all following levels will be formatted as normal sections.
Book parts,  book chapters and sections can have different numbering types. For example, book parts could be numbered with uppercase roman numerals, whereas book chapters are numbered with arabic numerals. The numbering types for book part, book chapter and section can be configured with the settings described below.
Book part numbering
If this configuration setting is checked, then numbering of book parts is turned on. The type of numbering can be selected from the listbox. This setting will only have effect, if the setting "Render 1st-Level as" is set to "book parts".
Book chapter numbering
If this configuration setting is checked, then numbering of book chapters is turned on. The type of numbering can be selected from the listbox.
Section numbering
If this configuration setting is checked, then numbering of sections is turned on. The type of numbering can be selected from the listbox. Furthermore you can control up to which nesting level the sections shall be numbered. For example, if you enter the value 2, then only sections at level 1 and 2 will be numbered.
Appendix numbering
If this configuration setting is checked, then numbering of appendix sections is turned on. The type of numbering can be selected from the listbox. This setting will only have effect, if the formatted publication contains appendix sections.
Omit title of single sub-section
If a section has only a single sub-section (e.g. because other sub-sections are filterd out), then you may want the title of the single sub-section to be supressed. You can achieve this by checking this configuration setting.
Exclude 1st-Level number from section labels
Normally, numbered sections have a section label that includes the numbers from the complete path up to the root level. For example, the first sub-section in the third section of the second chapter, would have a section label like "2.3.1". If this configuration setting is checked, then the section numbers do not include the chapter number (i.e. in the given example the section label would be "3.1").
Restart numbering in each book part
If this configuration setting is checked, then the chapter numbering will be restarted at the beginning of each book part. This setting will only have effect, if the setting "Render 1st-Level as" is set to "book parts".