How print sideways hp 3512 ?

Hello, Vicki -

I found a HP discussion board where someone posted the same question, but for a different model HP printer. See all the replies here:
https://h30434.www3.hp.com/t5/Inkjet-Printing/Paper-feeding-in-crooked/td-p/6334779

Best wishes.

Print cartridge HP 61

Turn the printer on.
Load paper into the paper input tray.
Open the cartridge door (located on the front of the printer), look for the recessed area, grab the built in handle (part of the recessed area) and pull forward.
Once the door is open, the cartridges will automatically move to the center position.
To change a cartridge, pull the top, front of the cartridge down, it will move to a 45 deg position. Then just pull out.
Open the new cartridge box, take the cartridge out of the wrapper, pull the tab to remove the tape covering the electrical contacts, (make certain you don't touch the contacts or ink nozzles), install the new cartridge (color on left, black on right), slide it into the holder and press up on the top, back until it latches into place. Then close the door.
The printer will print a test page. Once printed, take the alignment page it printed and put on the scanner glass (corner to top, right, see the guide printed there). Close the scanner lid and press the OK on the control panel. the printer will now align the print heads based on the page it printed. Once done, press OK again. Done.

Instead of hitting PRINT, there should be an option listed as PRINTER SETTINGS or better yet, PREVIEW. You should see an option for landscape or portrait and various other settings! Hope this helps! :-)

cannot detect alignment page- two possibilities-
1: hen the printer prints the alignment you can physically see the lines and colour shades being printed onto the sheet- this should then be scanned with the electronic eye built onto the carriage assembly- usually one automatic operation- if you can see a good clear image printed ( blocks/lines.boxes) and the printer cannot see the image it stands to reason the electronic eve ( spectrophotometer) is not reading the image correctly or at all, if however there are 'missing' areas of the calibration print then the problem lies with the printing side and I would recommend cleaning/ replacing the printheads as required

check to see if any other device can connect with the printer if they can then the wifi card on the unit is faulty and needs to be replaced.

scheck the printer ip yes it support wpa2-psk

find the paper feed rollers and clean them. they get slick and one side will catch quicker and pull the paper side ways.

You need to bring the guide in so the printer can pull in the envelopes properly, else it will print side ways.