What do you do if people are attached to the old logo?
You ask what they would still recognise if everything else changed, and that trait goes into the new mark. The whole drawing is not kept only because people like it if it no longer fits the cup or says what you serve.
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You ask what they would still recognise if everything else changed, and that trait goes into the new mark. Note the word they use: the colour, the animal, the letter. That trait is thrown out and on the street people ask if you have closed. You get the new mark with that trait inside, and the old one filed away.