What file does pin planner modify?

[Altera_Forum]

When I launch the pin planner from within Quartus, another application pops open. From that app, I can modify the pin assignment and other properties. There is no 'file save' operation. It just seems to modify something as I'm making changes. If I quit the pin planner, those changes just seem to 'take' 

 What is this modifying?

[Altera_Forum]

the Quartus Settings File (.qsf)

[Altera_Forum]

All assignments (for pin locations, I/O standards and more), including those made by the pin planner, are stored in the current project revision's *.qsf file. They are readable (tcl commands) text and can be inspected, copied, and - if you like - manually edited (as long as the project isn't opened). The *.qsf file is automatically updated when closing the project.

[Altera_Forum]

You can edit the .qsf even in the opened project (inside Quartus or external), it will take precedence.

[Altera_Forum]

Hi sorry to bump an old thread, but i have some problems with the pin planner. The .qsf get updated when i close the pin planner, but when i open the pin planner and click on the early pin assignment, the setting from last are not there. any inputs on how to fix this is appreciated. 

 /stefan