> ## Documentation Index
> Fetch the complete documentation index at: https://docs.speckle.systems/llms.txt
> Use this file to discover all available pages before exploring further.

# Exploration

> The full hierarchy of your model is available for inspection and exploration.

<Note>
  Need help deciding which review tool to use first? Start with [Review
  Workflows](/3d-viewer/review-workflows).
</Note>

## Models panel

The Models panel lets you navigate your 3D model using a familiar tree view:

1. **Hierarchy view:** See models organized by levels, categories, or custom groups.

2. **Visibility controls:** Show, hide, or isolate individual objects or groups with a single click.

Use the panel to focus on the parts of your model you care about, cleanly toggle layers, and understand the structure of complex scenes.

<Frame>
  <img src="https://mintcdn.com/speckle/YrJFGLA1qDYoqsMd/images/3d-viewer/scene_explorer.jpg?fit=max&auto=format&n=YrJFGLA1qDYoqsMd&q=85&s=c30bc342bd77e1bb9d7df9d460cf5e6c" width="1620" height="1080" data-path="images/3d-viewer/scene_explorer.jpg" />
</Frame>

<Note>
  The model hierarchy displayed is as it is exported from the source
  application. There are some differences between each connector that reflects
  the typical workflows of users in that application.
</Note>

<AccordionGroup>
  <Accordion title="Can I show the hierarchy in a different order?">
    No, the hierarchy is as it is exported from the source application. Our
    developer documentation has more information on how to work with the
    underlying data that could achieve this.
  </Accordion>
</AccordionGroup>

## Filter and color by property data

Speckle's filtering tools let you quickly find, highlight, color-code, and analyze parts of your
model based on any property or parameter:

<Frame>
  <img src="https://mintcdn.com/speckle/YrJFGLA1qDYoqsMd/images/3d-viewer/filtering.jpg?fit=max&auto=format&n=YrJFGLA1qDYoqsMd&q=85&s=18124af7596b513cb7974c75ee05b41e" width="1620" height="1080" data-path="images/3d-viewer/filtering.jpg" />
</Frame>

Filter, color, and search:

1. Open the filter panel and choose any property from your model (e.g., category,
   level, tag).

2. Type or select values to narrow down the list of objects.

3. Click the brush icon on the top right corner of the panel to color-code values
   for that property.

4. Query specific values. Use the search box to look for a particular value within
   the filtered property (e.g., all "category" Walls with “FireRating = 2”).

<Tip>
  **Tip:** First, use a filter in combination with isolate, then apply another
  filter to explore the model further.
</Tip>

<Note>
  You can also start a filtering session from the Selection info panel. Select
  an object, then use any property there to open Filters with that context.
</Note>

<AccordionGroup>
  <Accordion title="How do I filter by a custom property?">
    Any property in the model can be filtered on, and you can also color-code by
    that same property using the brush icon.
  </Accordion>

  <Accordion title="Can I filter by a property that doesn't exist?">
    No, the property must exist in the model. However you could use the Model
    Checker premade automation to add a test for a property and its results can
    be used as a filter.
  </Accordion>

  <Accordion title="How can I know what properties are available?">
    As you type in either the property search bar or the value search bar,
    Speckle will show a list of properties that match the text you've typed.
  </Accordion>

  <Accordion title="Can I bookmark or favourite particular properties?">
    Yes. In Selection info, use **Pin property** on a property value to add it
    to your favourites, so it is easier to find when reviewing selected objects.
  </Accordion>
</AccordionGroup>

## Dev(eloper) mode

Dev mode gives you a deeper look into your model's data structure:

* **Full hierarchy view.** See every object, list, and parameter exactly as Speckle stores it.

* **Raw JSON inspection.** View and copy the underlying JSON data for any item; perfect for developers or power users.

<Frame>
  <img src="https://mintcdn.com/speckle/YrJFGLA1qDYoqsMd/images/3d-viewer/dev_mode.jpg?fit=max&auto=format&n=YrJFGLA1qDYoqsMd&q=85&s=c269d3549b4ffd54a0ffa6f026e26087" width="1620" height="1080" data-path="images/3d-viewer/dev_mode.jpg" />
</Frame>

<Tip>
  Use Dev mode when you need complete transparency or want to integrate Speckle
  data into your own workflows and applications.
</Tip>

<AccordionGroup>
  <Accordion title="How do I enable Dev mode?">
    Dev mode is enabled by default for all Speckle users.
  </Accordion>

  <Accordion title="How do see the data for a single object?">
    Click on an object in the hierarchy view to see the data for that object
    above the overall hierarchy view.
  </Accordion>

  <Accordion title="Can I see the raw JSON data for a property?">
    Dev mode visualises the JSON structure. Our developer docs have more
    information on how to access and use the raw data view.
  </Accordion>
</AccordionGroup>

## Measure

Use the Measure tool to verify dimensions, check clearances, and validate design details without leaving the viewer.

<Frame>
  <img src="https://mintcdn.com/speckle/YrJFGLA1qDYoqsMd/images/3d-viewer/measure_mode.jpg?fit=max&auto=format&n=YrJFGLA1qDYoqsMd&q=85&s=faa96c7f687c2e63d4489390fc2fa0de" width="1620" height="1080" data-path="images/3d-viewer/measure_mode.jpg" />
</Frame>

### Measurement types

* **Point-to-point measurement.** Click two points in the model to get the straight-line distance.
* **Perpendicular measurement.** Measure the shortest distance from a point to a line or plane.
* **Area measurement.** Measure the area of a polygon or closed polyline.
* **Point coordinates.** Get the exact XYZ coordinates at any point in the model.

### Measurement settings

* **Snap to vertices**: Toggle snapping to the nearest vertex on the model.
* **Chain measurements**: Toggle chaining measurements for point-to-point measurements.
* **Units**: Switch to your preferred unit display from standard length units (mm, m, ft, in) in imperial or metric.
* **Precision**: Adjust the decimal precision to suit your needs.
* **Delete measurements**: Delete all measurements from the model.

<AccordionGroup>
  <Accordion title="How do I cancel a measurement?">
    Press the `Escape` key on your keyboard to stop chaining measurment points,
    or conclude the area measurement.
  </Accordion>

  <Accordion title="Can I measure the area of a slope?">
    Yes, your first measurement point will be both a start point and also define
    the plane of the area measurement.
  </Accordion>

  <Accordion title="Can I add multiple areas to gain a sum total?">
    No, Each area measurement is it's own entity. For more complex area
    measurements you can add the Room and Area Scheduler premade automation to
    your model.
  </Accordion>
</AccordionGroup>