If you need advanced port prompting (e.g., ask once per session, generate timestamped names), switch to a third-party virtual PDF printer. This script prints a .txt file to PDF silently, auto-generating a unique filename without port prompt.
set PRN=Microsoft Print to PDF set TMPPORT=C:\temp\auto_%RANDOM%.pdf reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Print\Printers\%PRN%" /v Port /t REG_SZ /d %TMPPORT% /f notepad.exe /p test.txt reg add "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Print\Printers\%PRN%" /v Port /t REG_SZ /d PORTPROMPT: /f (Note: Admin rights required – not production-safe.) | Feature | Microsoft Print to PDF | Adobe PDF | CutePDF | Foxit PDF | |--------|------------------------|-----------|---------|------------| | Port prompt suppression | No native | Yes (registry) | Yes (config) | Yes | | Custom port naming | Limited | Yes | Yes | Yes | | Scriptable without UI | Partial (fixed file) | Yes (com) | Yes (cli) | Yes | | Default save path memory | No | Yes | Yes | Yes | microsoft print to pdf on portprompt
A key but often overlooked feature is the — the dialog that asks where to save the PDF file. Understanding and controlling this prompt is essential for workflow automation, silent printing, and troubleshooting. If you need advanced port prompting (e