Views the internal name of the project, which is only used for bookkeeping and the title bar.
Shows the location of the project file.
Shows the output location of the executable. This can be editted by Build Options >> Executable Output Directory and Override Output Filename.
Shows the amount of files inside the project (.cpp/.h/.rc).
Dev-C++ can add an Icon to the executable for you. By doing this, Dev-C++ will add 'A ICON MOVEABLE PURE LOADONCALL DISCARDABLE "filename.ico"' to a temporary resource file (projectname_private.rc) that is attached to the project at compile time.
Library
Opens up the \Icons folder which provides an antique set of ye-olde icons. One can of course add his own icons to that folder, so that they will show up here.
Browse
Opens up a File Browser to search through the file system for icon files.
Remove
Detaches the currently selected icon from the project. Does not delete the file itself.
Toggles a few compiler options. For example, by selecting 'Win32 GUI', Dev-C++ will add '-mwindows' to the GCC commandline, so that the application does not create a console window anymore.
If enabled, Dev-C++ will add a Common Control 6 Manifest to the project. Dev-C++ will add '1 24 "Project1.exe.Manifest"' to a resource file (projectname_private.rc) coupled to the project at compile time. This enables Windows XP styles if available.