Line up the decoder with the letters for the "key". If the is key shows L (its red) = O(its green) then you click the O turn it in ring until it comes to L. Then you can see what the code letters (in red) mean in the actual message (the green letters).
you go to the dude in the thrash can talk to him and he will give you a sercert message which say on the roof
you can use the decoder in spy island. if you see some mysterious people, (normally in black) talk to them and they may give you a message.
you use the decoder to depict spy messages. you line up both letters so that the red is lined up with the green text. the red text is the outer ring. then you look at the red text and look under it to match the green text. then you type it on the lower section of the note pad. that is how you use a decoder on spy island
Use the decoder to decipher messages from friendly spies. (see related question)
It means "on the roof" (you use the decoder ring to decipher it - get the decoder from Director D at Spy Headquarters). The first spy is being held at the docks, and the only door is on the roof. You need the Chameleon Suit from Dr. Spyglass to slip by the guards.
you have to read the messages that you get from other spies and when it says the key is O=n or something else like that, you line those letters up in the decoder
at the bottom it has ?=? so the first letter goes around the second letter
You don't. You have to get a grabbling hook from a spy and use it.
To decode file X, you read the letters going down on the left side of the paper. It reads, "Don't trust Director D". But there is nothing you can do with this information. (To use the Decoder, see the related question)
You move the inside ring to what the code says to do and then you write what it sais in the notes area of the page. You can also print it out and do it yourself but that's a lot more work fpr you to put on your precious little shoulders.
It means "fingerprint." You can get a glass with the fingerprint of a BAD bigwig by getting the chef's job at the BAD Bistro. It can help you later with a security door. You use the spy decoder that you get from Director D at the Spy Headquarters. Setting the red letter L next to the green letter F lines up the other code letters with what they really mean.
You use it as a grappling hook!
You use them to see lasers.