====== Add a composite line ======

A **composite line** allows several time-related pieces of information
to be displayed together within the same cell of the time axis.

Unlike a single line that displays only one time unit
(day, week, month, etc.), a composite line allows you to
**combine multiple time values within the same label**.

For example:

  * Day – Month
  * Week – Year
  * Day – Month – Year

{{:en:time_distance:2026-03-12_21h37_30.png?600|}}

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===== Operating principle =====

A composite line works by combining several time values
within a single label.

Each value is separated by a **customisable separator**.

For example, a composite line may display:

  Fri - March - 2026

The **Preview** field allows you to immediately
visualise the result of the selected format.

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===== Values to display =====

A composite line can contain up to **three time values**.

The available parameters are:

  * **Value 1 to display**
  * **Value 2 to display**
  * **Value 3 to display**

Each value may correspond for example to:

  * the day
  * the week
  * the month
  * the year

These values allow you to build a rich time label
adapted to the desired level of detail.

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===== Separators =====

The **Separator 1** and **Separator 2** fields allow you
to define the character used to separate the different values.

For example:

  * Day - Month
  * Day / Month / Year
  * Week | Year

These separators allow the display format to be adapted
to the conventions used in your project.

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===== Display interval =====

The **Interval every** parameter defines how frequently
the labels are displayed.

For example:

  * every 7 days
  * every month
  * every week

In the example above, an interval of **7 days**
allows a label to be displayed **every week**.

This makes it possible to adjust the density of the
time scale and avoid visual overload.

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===== Start date =====

The **Start date** field allows you to define the reference
from which the intervals are calculated.

This parameter is particularly useful to:

  * align the scale with a **week start**
  * align the scale with a **month start**
  * adjust the reading of the schedule according
    to the project calendar

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===== Formatting =====

As with single lines, several parameters allow
the appearance of the time scale to be adjusted:

  * **font**
  * **text size**
  * **column width**
  * **text position**
  * **text rotation**
  * **background colour**

These options improve the readability of the
Time-Location schedule and adapt the display
to the complexity of the project.