Here you can edit properties and behaviour of project files per-file.
Build priority
Sets the Build Priority of the currently selected item. One can use this to sort Project Items and Build order.
Include in Compilation
Adds the file to the object file creation.
Include in linking
Include the generated object file in the executable creation.
Compile file as C++
If checked, use the CXXFLAGS line in the makefile instead of CFLAGS. This option also controls if this file is affected by global project CFLAGS/CXXFLAGS edits found in the Parameters tab.
Override build command
Here you can create your own build command for the current file.