# Lignes d'octave

## Overview

**Octave** (**Ottava**) lines are used to indicate that a section of music is to be played one or more octaves above or below written pitch; the line may be dotted or solid:

8--------┐or 8va--------┐: Play one octave above written pitch.\
8--------┘or 8va--------┘: Play one octave below written pitch.

8va alta/bassa lines are particularly common in piano scores, though they are sometimes used in other instrumental music. 15ma alta (2 octaves above) and 15ma bassa (2 octaves below) are also occasionally used.

MuseScore automatically adjusts playback of the score under the ottava to the correct pitch.

Ottava lines may be found in the **Lines** [palette](/fr/basics/using-the-palettes.md).

## Adding an octave line to your score

See [Adding a line to your score](/fr/notation/expressive-markings/other-lines.md#adding-a-line-to-your-score).

To adjust the range and vertical position of the line, see [Adjusting elements directly](/fr/basics/adjusting-elements-directly.md).

## Octave line properties

Properties specific to the selected ottava(s) can be adjusted in the **Ottava** section of the [Properties](/fr/basics/properties-panel.md) panel, namely:

### Style tab

**Type**: Specifies whether the Ottava line is 8va, 8vb etc.\
**Show number only**: Hides any text (such as “va”).\
**Show line**: Makes the line visible / invisible. Text is unaffected.\
**Allow diagonal**: Allow line to slope if required.

For other properties in this tab, see [Line properties](/fr/notation/expressive-markings/other-lines.md#line-properties).

### Text tab

This has a similar user interface to general lines (see [Line properties](/fr/notation/expressive-markings/other-lines.md#line-properties)), but uses special code to specify the ottava text.

## Octave line style

Default properties for ottavas can be adjusted in `Format`→`Style`→`Ottava`.

<figure><img src="/files/lkpm3Ms47vZru9gaUViZ" alt="Ottava style"><figcaption></figcaption></figure>


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