# Opening an Existing SpiTran Project

### Opening the Project

Choose Open from the SpiTran File menu, or click the icon. A file browser will open, allowing you to select a SpiTran project file. The project file resides in the project directory. It has the same name as the project directory, with a .spp extension. SpiTran will load settings from the project file, and display the circuit instantiations in the main window.
To open an existing project it is necessary that you have saved the project.

### Editing Project Setup

Choose Setup... from the SpiTran Edit menu to open the SpiTran Project Setup dialog. You may make changes to the project setup following the instructions for Creating a New Project. The only limitation is that you can not import a new SPICE file into an existing project.