Use a text editor such as notepad to edit the "config.ini" file in the game directory. Change the DebugPanel = 0 line to DebugPanel = 1. Start a new game and press ` or ~ and and a debug panel with various options will appear on the right side. For example, select the "Reveal All" option to view the full map. Be carefull and have a backup ready of the file you modified.