> For the complete documentation index, see [llms.txt](https://docs.jmapcloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.jmapcloud.io/en/jmap-cloud-portal/user-guide-for-jmap-cloud-portal/configuring-project-data/defining-project-extents.md).
# Defining Project Extents
You can define two extents for the project:
* **Initial extent**: the geographic area displayed by default when the project is opened in a JMap NG application or in Studio. This is useful for centering the map on an area of interest.
* **Maximum extent**: the geographic area used to restrict user navigation on the map. Users cannot navigate outside this extent. This is useful for preventing users from leaving the data's area of interest.
Project extents are defined in the **Project** panel in Studio.
**To define the initial extent:**
1. Activate the tool by clicking 
in the **Initial Extent** row.
2. Click once to begin drawing the rectangle.
3. Draw the desired area, then click a second time to finish. The initial extent is shown with a black dashed line.
**To define the maximum extent:**
1. Activate the tool by clicking in the **Maximum Extent** row.
2. Click once to begin drawing the rectangle.
3. Draw the desired area, then click a second time to finish. The maximum extent is shown with a solid red line.
You can validate both extents by opening the project in JMap NG. You can also delete an extent by clicking 
.
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