# Drilldown Behaviour

This article explains drilldown behaviour for charts and tables in Model Reef.

You will learn:

* How to navigate from visuals to underlying variables.
* What information is shown on drilldown.
* How drilldown supports auditability and review.

Drilldown links the presentation layer back to the modelling layer.

{% stepper %}
{% step %}

### What drilldown does

When you drill into a chart or table item:

* Model Reef opens details about the underlying series.
* You can see which variables, categories or drivers contribute to the number.
* You can open the relevant Variable or Driver Editor from there.

This lets you move from high level views to the assumptions that generate them.
{% endstep %}

{% step %}

### How to drill down

Typical drilldown interactions include:

* Clicking a series name or value in a chart legend.
* Clicking a table row or cell with drilldown enabled.
* Using a context menu option such as "View details" or "Open variable".

Exact controls depend on the specific dashboard component.
{% endstep %}

{% step %}

### Information shown on drilldown

On drilldown you may see:

* The list of contributing variables or drivers.
* Category and branch context.
* Notes and attachments on those variables.
* Links to open the full Variable Editor or Timing modal.

This gives reviewers enough context to understand where a line comes from.
{% endstep %}

{% step %}

### Editing from drilldown

If you have edit permissions on the model or branch:

* You can open the Variable or Driver Editor from the drilldown view.
* You can then change inputs, timing or formulas.
* After saving, charts and tables update to reflect the new assumptions.

Viewer-only users can inspect details but will not be able to edit.
{% endstep %}

{% step %}

### Review and audit workflows

Drilldown supports review workflows by:

* Allowing reviewers to follow the trail from dashboards to assumptions.
* Making it easy to test the effect of assumption changes.
* Helping teams align on which variable to adjust when numbers look off.

Use drilldown regularly to keep high level reporting connected to the underlying model logic.
{% endstep %}
{% endstepper %}

***

## Related articles

* [Multi-Branch Driver Behaviour](/syntax/drivers-syntax/multi-branch-driver-behaviour.md)
* [Editing Bounds](/syntax/how-input-fields-work/editing-bounds.md)
* [Default Valuation Assumptions](/help/stock-ticker-fundamentals/default-valuation-assumptions.md)
* [Build a Budget vs Actuals Model](/how-tos/scenarios-and-planning/build-a-budget-vs-actuals-model.md)


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