How do I check the ink levels on my ET-2803?
You can check ink levels directly on your product, through Windows, or on a Mac. The manual provides instructions for all three methods in the 'Check Ink Levels' section starting at page 146. Use your preferred method to monitor when it's time to refill the ink tanks. (Page 146-148)
From the official Epson Et-2803 Printer manual, page 146
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