how to change paper size

[MugrubV]

I cannot copy a document on my new ENVY 5540 printer becasue the dosument i want to copy is on A4 Paper and the printer says that the paper in the main tray is 10x15. How do I change the papaer size?

[A4Apollo]

Hi! @MugrubV, Welcome to HP forums.

I understand you would like to know how to change paper size on your printer.

Don't worry I'd like to help you out.

Did you make any changes to your printer?

Please try the steps recommended below.

Check the paper size setting to make sure it matches the paper you want to print.
   NOTE:
Some printers have an option to ignore the error and continue printing. If you choose to ignore the error, the margins on your printout might not be proportional to the edges of the paper.
In the program, you want to print from, click File, and then click Print.
Make sure your printer is in the Name or Printers drop-down list box, and then click Properties, Printer Properties or Preferences.
Click the Paper/Quality tab.
Click Advanced, if necessary, and then click Paper Size.
sizes, select the size from the list that is closest to the size of the paper loaded in the tray.
Click OK, and then try to print.
   NOTE:
If you are printing envelopes, you might need to change the mail settings of the program you are printing from in addition to adjusting print settings in the driver. For information on changing envelope settings in Microsoft Word, see How do I adjust the envelope settings in Microsoft Word? in the FAQ section of this document.

Refer this article to further troubleshoot paper mismatch errors.

I'll watch your reply!

Take Care! 🙂