The button means that when tapped, Identicode expects you to write a coded message, probably taken from a copy of the Century 21 magazine, into the uppermost text box for decoding into readable text.
The button means that when tapped, Identicode expects you to write human readable text into the uppermost text box for encoding.
In the original magazine, some messages were given in red and some in blue; each colour uses different decoding/encoding which the app understands.
If for example, you are decoding a supplied red message then tap the red button - text in the upper input box will turn red as confirmation and the decoded readable text appears in the lower box in black after tapping the Convert button.
To encode your own message into blue code then tap the blue button - text in the upper input box will show as black (indicating readable text) and the coded text appears in the lower box in blue after tapping the Convert button.
When you encode a message and then copy or share it, Identicode (V1.4+) records the encoded colour as well. When the receiving agent pastes the text you’ve sent/shared into their copy of Identicode (V1.4+) it automatically switches to Decode and selects the right colour. You just need to tap Convert to read the actual message!
Shake your device.
Tap ‘IDENTICODE’ at the top of the screen.
Yes - you can find them here.