Hi there
Hope you are doing well and thanks for reaching out. We are sorry for the trouble you are experiencing.
I understand how frustrating that must be. If the custom scale option isn’t working as expected, here are a few things you can try:
1. Check the Page Setup: In the Print dialog, make sure “Fit” or “Shrink oversized pages” isn’t selected. Only “Custom Scale” should be checked when you enter your percentage.
2. Printer Settings: Some printers have their own scaling or “fit to page” options that can override Acrobat/Reader settings. Double-check your printer properties to ensure scaling is disabled there.
3. Update the App: If this worked before and recently stopped, it may be related to an update. Try updating to the latest version 25.01.20645 of Acrobat/Reader. Go to Help > Check for updates and reboot the computer once.
4. Test with a Different File: Sometimes specific PDFs have restrictions or unusual page sizes that affect scaling. Try with a simple document to see if the issue persists.
Also please check the help page (https://adobe.ly/47nDWZH) and see if that works.
~Amal
Meet Acrobat Studio