Numbering and references
Texifine numbers what LaTeX numbers, the way LaTeX numbers it. The numbers you see in the editor are the ones the PDF prints.
What is numbered
| Element | Numbered when… |
|---|---|
| Chapter, section (H1), subsection (H2) | it is not marked Plain |
| Sub-subsection (H3) | the document has no chapter, and the heading is not marked Plain |
| Equation | it is not marked Plain and its formula is not empty |
| Figure | it has an image and a caption |
| Table | it has a caption |
| Theorem, lemma, proposition, corollary, definition | always |
| Remark, example, proof | never |
| Footnote | always, in order of appearance |
How chapters change the numbers
A chapter restarts the numbering of what follows it and gives it a prefix.
- Before the first chapter — or in a document without chapters — everything is numbered 1, 2, 3…
- Inside chapter 2, sections are 2.1, 2.2…, figures are Figure 2.1, 2.2…, equations are (2.1), (2.2)…, and theorems are 2.1, 2.2…
Each kind has its own counter: Figure 2.1 and Table 2.1 can both exist. Theorems, lemmas, propositions, corollaries and definitions share one counter: Definition 2.1, Theorem 2.2, Lemma 2.3.
Sections are numbered within their chapter (2.1) and subsections within their section (2.1.1). In a document with chapters, sub-subsections are printed as unnumbered headings — a fourth level, 2.1.1.1, would be too deep. In a document without any chapter, sections are 1, subsections 1.1 and sub-subsections 1.1.1.
Plain headings and equations
A heading or an equation marked Plain prints no number and does not count: what follows keeps counting from the last numbered one. A plain chapter does not restart the numbering of sections, figures, tables, equations or theorems, and is not listed in the table of contents.
Use it for an introduction, a conclusion or acknowledgements.
Referring to something
A cross-reference prints the number of a block and follows it if the number changes.
- Put the caret where the number should go — after "see Figure ", for example.
- Press
Ctrl+Alt+R, or select text and click the cross-reference button. - Choose the target in the list. You can search by kind ("lemma"), by number or by text.
The reference prints the number alone. You write the word before it — "Figure", "Theorem", "equation" — in your own language and with the article you want. For an equation, write the brackets yourself: ( reference ).
In the PDF the number is a link to its target. Links have no coloured frame, so a printed document stays clean.
Click a reference to change its target.
What can be referenced
Only what has a number: numbered chapters, sections and subsections, figures and tables with a caption, numbered equations, and theorems, lemmas, propositions, corollaries and definitions. Remarks, examples, proofs, paragraphs and code listings cannot be referenced.
A reference that shows "?"
The target was deleted, or lost its number: a figure whose caption was removed, a heading marked Plain, a lemma turned into a remark. Give the target its number back, or click the reference and choose another one. A reference never silently prints the wrong number.
Renumbering is automatic
Move a figure above another, insert a section, delete a theorem: every number and every reference updates, in the editor at once and in the PDF at the next compilation.