> For the complete documentation index, see [llms.txt](https://swatplus.gitbook.io/io-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://swatplus.gitbook.io/io-docs/introduction-1/simulation-settings.md).

# Simulation Settings

There are three files that control the settings for a simulation run:

* [**object.cnt**](/io-docs/introduction-1/simulation-settings/object.cnt.md) specifies the land area and the total area (including ponds and reservoirs) of the watershed and the counts of all spatial objects in a simulation,
* [**time.sim**](/io-docs/introduction-1/simulation-settings/time.sim.md) controls the simulation time period and time step, and
* [**print.prt**](/io-docs/introduction-1/simulation-settings/print.prt.md) controls which output files will be printed for a simulation.

An additional, optional file, [**object.prt**](/io-docs/introduction-1/simulation-settings/object.prt.md), allows the user to print selected output for individual spatial objects.