How to print on large envelopes 9 x 12 white envelopes?

The best way to deal with envelopes is to either get a label printer like a Brother, or get laser safe window envelopes. Envelopes cause many problems and if you are going to print a large number of them you will wear out the fuser prematurely because the outer edges of the fuser will overheat feeding the narrower paper.

The upper tray on my 6120 has adjustable guides on either side of the document and can be set from 2" to 8.75" wide. It is not intended just for photos! I use it for ALL envelopes that will fit. I use the MS WORD "Mailings", "Envelopes", "Options", "Envelope Size" menu to tell the printer what size the envelope will be (any size not listed in the standard list can be customized from the CUSTOM option at the bottom of the envelope list). Your word processor should have something similar. Running from the tray should be a straighter run and will actually place less distortion stress on the envelope.

Use a mailing label for anything larger than 8.75". You can download a program from Avery (and probably other label manufacturers) that really makes labels simple to produce. Labels should also be run from the rear tray if possible so they won't wrap around your rollers.
Happy Printing.

load your envelope in stakbypass and chose free size and enter your envelope size then you have to custome size your pc as envelope then print your document.

you must put it in the bypass and put the size and the kind of the envelope

If it will fit nto the feed tray yes. you have to go into options when you print and enter the size of the envelope. you may have to enter it as a custom size.

Instead of moving the whole green lever to adjust that grey arrow to the envelope symbol, simply push the gray part that has the arrow on it. This will move the gray piece down to the env. symbol and will not move the green lever so you can close the back door. I used to have severly wrinkled envelopes. Now they print out perfect.

Go into your Word Document and print from "Tools" then "Letters and Mailings" and click on Envelopes and Labels. Sometime the perimeter isn't defined and it is on there but it's outside the scope of your envelope, especially if the return address isn't in the correct place also. You may even be able to correct it where you are by decreasing the "window" of your typing space, it's just too large.

Open a MS Word Document, select 'Tools' then 'Letters and mailings' then 'Envelopes and labels...'

Envelopes and Lables dialogue box opens - ensure you are on the 'envelopes' tab

Then type your recipient address in the larger white box

for standard letter envelope (DL 220m x 110mm) - Insert envelope into Brother HL-2030 manual feed, with print side up, gummed flaps down and to the left side (bring gray plastic guides in close to secure).

Then select print.

I have found that during the feed, one end of the envelope gets a little bit crumpled but overall it's still a little bit more professional looking than my handwriting.

How to copy/print onto envelopes.
Solution
Konica Minolta does not recommend copying/printing onto envelopes, asthe MFPwas not designed to run envelopes. Additionally, envelopes do not meet the
standards set for paper specifications. Their multi-layer make-up, adhesive, and odd size make it unreliable and potently damaging to the MFP.

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I have(had) the same problem using the Dell A920 printer on a Dell compunter running XP. After spending a hour trying to find a solution on the internet, I finally found a solution on my own. When ready to print a envelope. Go to File/Print Click Properties button In lower right hand corner, check "Print Color Image in Black and White" box Click OK button Click OK in print pop up When finished, repeat to uncheck "Print Color Image in Black and White" box to allow for color printing.