How do I save a pop out window expanded as opposed to having to manually expand every time I open a new email/type a reply response?

Hi @Shannon Cowles

Thank you for reaching out to Microsoft Q&A Forum. 

I know how inconvenience it is to manually expand every time you open a new email/type a response, and I completely understand your scenario. 

If you use New Outlook desktop app and want to resize it. Unfortunately, this edition does not currently support saving the size or maximized state of pop-out windows.  

If you use Outlook Classic (integrated in Microsoft Office Suite), you can follow this way 

1. Open a new email or reply. 
2. Resize and reposition the window to your preferred size. 
3. Hold down Ctrl and click the X to close the window. 
4. Outlook may remember this size and position for future pop-outs 

I hope my solutions can help you solve the problem, and I truly appreciate your insights, and if I’ve misunderstood anything or made an error, I’d be grateful if you could kindly point it out. 

If you need further assistance, feel free to ask!   

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