====== Display and navigation ======

The **Gantt chart** provides several tools that allow you to adjust the schedule display and easily navigate through the project activities.

These tools make it possible to:

  * modify the time scale
  * show or hide certain Gantt elements
  * filter activities
  * adjust the schedule visualisation

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===== Time scale management =====

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A **right-click on the time scale** provides access
to the time display options.

Available actions include:

  * **Add time line**  
    *Adds an additional scale level (years, months, weeks, days, hours or minutes).

  * **Delete time line**  
    *Removes the selected time scale line.

  * **Properties**  
    *Allows modification of the time scale parameters.

  * **Show / Hide grid**  
    *Displays or hides the grid corresponding to the selected time scale.

  * **Adjust time scale**  
    *Automatically adjusts the Gantt scale so that all visible activities are displayed.

  * **Show / Hide time indicator**  
    *Displays a marker indicating the current date or time.

  * **Change background colour**  
    *Changes the background colour of the header containing the time scale.

  * **Layout**  
    *Adjusts the position of the texts in the time scale.

  * **Font**  
    *Changes the font used in the display.

Some options also provide direct access to **filtering**, **grouping**, or **rescheduling** tools.

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===== Gantt toolbar =====

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The toolbar located above the Gantt chart allows quick actions
on the schedule display and organisation.

It provides several features.

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==== Filter by zone ====

The **Zone** filter displays only the activities
associated with a specific project zone.

This filter is particularly useful for **linear projects**
or projects containing several work areas.

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==== Filter by time period ====

The **Start** and **Finish** fields allow activities
to be filtered according to a selected time range.

Two modes are available:

  * **Between**: displays activities intersecting the period
  * **Strict**: displays only activities fully contained
    within the selected period

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==== Advanced filter ====

The **Advanced filter** button allows the definition of
more precise criteria to display certain activities.

Activities can be filtered according to various
project fields.

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==== Grouping ====

The **Grouping** function organises activities
according to a specific criterion.

For example:

  * by zone
  * by activity type
  * by category

Grouping improves schedule readability and analysis.

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==== Activity display style ====

The **Activity display** menu allows modification of how activities appear in the **Gantt chart**.

Activities can be coloured according to:

  * their **style**
  * their **colour**
  * the **associated zone**
  * certain **activity fields**

This improves the readability of the schedule.

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==== Add an activity ====

The **+** button allows a new activity
to be quickly added to the schedule.

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==== Reschedule ====

The **Reschedule** button recalculates the schedule dates
according to the links and constraints
defined between activities.

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===== Navigating the schedule =====

Navigation in the **Gantt chart** can be performed in several ways:

  * by moving the view horizontally along the timeline
  * by using filtering tools
  * by adjusting the time scale
  * by collapsing or expanding hierarchy levels

These tools make it possible to navigate efficiently
even in schedules containing a large number of activities.