> For the complete documentation index, see [llms.txt](https://docs.betterbuilding.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.betterbuilding.io/user-guide/2d-building/drawing/manage-purpose-settings.md).
# Manage Purpose Settings
A Purpose defines how a zone or space is intended to be used, and it's particularly important for daylight modelling. Assigning the correct purpose ensures the model reflects how each area functions throughout the day, supporting more accurate analysis.
## Add a Zone Purpose
To add a zone purpose, start by selecting the relevant zone. Click on the ‘Space Settings’ button, then navigate to the ‘Purpose’ section. From there, choose ‘Set Purpose’, select 'Create Custom' from the dropdown menu and then the appropriate Purposes. Note, you can rename default Purpose names should you prefer a specific Purpose to be referenced in your results. Then, and click ‘Save and Close’.
You can assign multiple purposes across different zones, for example, tagging living areas as ‘Day’ and bedrooms as ‘Night’ to reflect their primary use.
## Add a Space Purpose
To add a space purpose, start by selecting the relevant Space. From there, choose ‘Purpose’ in the space ribbon, select 'Create Custom' from the dropdown menu and then the appropriate Purposes. Note, you can rename default Purpose names should you prefer a specific Purpose to be referenced in your results. Then, and click ‘Save’.
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