Inking manga can be a daunting task, especially when trying to maintain clean lines within the panel borders. Even seasoned artists sometimes struggle and accidentally ink over the panel edges, which then requires time-consuming corrections. From my own experience, the key to minimizing these mistakes lies in a combination of patience, proper tools, and technique adjustments. First, I recommend using pens or brushes with the right nib size for your artwork. A finer nib allows more control but may slow you down, while a thicker pen may tempt you to rush, leading to overspill. Testing different inking tools can help find what works best for your style. Second, creating light pencil guidelines that define the panel borders clearly before inking is invaluable. This visual frame helps keep your strokes contained and prevents accidental over-inking. Some artists even use masking tape over panel borders as an additional physical barrier. Third, take regular breaks to avoid fatigue, which often causes hand slips and mistakes. Staying relaxed and focused improves line precision. Finally, accepting that mistakes are part of the process can reduce stress. Instead of fearing the error, view it as a chance to improve and refine your workflow. Digital corrections are helpful but learning to ink confidently without constant fixes enhances overall skill. By implementing these practices, mangaka can fight the common struggle of "not inking over the panel border" and produce cleaner, more professional manga pages with less frustration and rework.