Navigate to the Epic Pen pricing page. The developers offer several tiers, including:

Within the menu, select the option to upgrade or activate Pro. Enter Your Code: Paste the activation code you received. Enjoy: The toolset will immediately expand to Pro features. Key Features Unlocked by a New Pro Key

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Copy and paste your purchased activation code into the field.

As a Pro user, your favorite tools retain their customized thicknesses and colors. Set up your preferred highlighter in a semi-transparent yellow, and your fine-tip pen in a bold red for corrections. This organizational capability makes reviewing documents incredibly fast. ⚠️ A Note on Security and "Free" Code Generators

so I can suggest the best license type?

Epic Pen Pro is a top-tier screen marker tool for Windows and Mac. It lets you draw, write, and highlight over any application in real time. While the basic version offers essential tools, upgrading to the Pro version unlocks advanced features like text tools, lines, arrows, and whiteboard modes.