> For the complete documentation index, see [llms.txt](https://help.arkance-systems.com/pressure-drops/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.arkance-systems.com/pressure-drops/en/manual.md).

# User guide

- [Pressure Drop Calculation](https://help.arkance-systems.com/pressure-drops/en/manual/pressure-drop-calculation.md): Basic concept of working with Pressure Drops
- [Pressure Drops Main Dialog](https://help.arkance-systems.com/pressure-drops/en/manual/main-dialog.md): Main dialog for calculating Pressure Drop
- [Duct Connection](https://help.arkance-systems.com/pressure-drops/en/manual/duct-connection.md): Automatic connection of adjacent elements
- [Settings](https://help.arkance-systems.com/pressure-drops/en/manual/settings.md): Pressure Drops application settings