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The custompagecontent.action page you refer to at Settings > Look and Feel > Header and Footer is the correct place to add your logo:
Note that according to these instructions, you need to first attach the image to a page or on the internet in order to use it. You will not be able to reference a local copy here, and if you were to, it would not be visible by anyone who does not have direct access to your PC.
If you're still having trouble, can you show me the header code you're using?
- Create your own custom emoji 🔥 - "Shake for Feedback" on mobile 📱 - An endless supply of GIFs via GIPHY 🤩 Is there anything quite as nice as a pleasant surprise? Comment below with what...
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