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Hi @JaydenJr,
Welcome to the Q&A forum!
Thank you for sharing your feedback. I understand you'd like the Table of Contents to remain pinned when viewing PDF files in Microsoft Edge, rather than disappearing after use.
After looking into this, I found that the current version of the Edge PDF reader does not support this functionality. You're definitely not alone in wanting this feature, and we truly appreciate you bringing it up.
I encourage you to submit this idea through the Microsoft Feedback Portal. The team actively reviews suggestions there, and it's a great way to help shape future updates.
Thanks again for reaching out, and please let us know if there's anything else we can assist with!
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