We want to purches a laser printer for printinhg legal size paper,which printer we use

it seems that on your model you can only use legal size paper on tray 1 & 2, then you have to set the paper size.
here is a link to instructions for your model.
http://download.brother.com/welcome/doc002258/mfc9840_uk_usr_b.pdf

This is for a temporary, as needed solution: Press "Menu/Set" button. Select "General Setup". Scroll down and select "Paper Size", find and select "Legal" size. Press Menu/Set button again. Press "Stop/Exit" button.
Insert legal size paper to be copied on the feeder tray and put a legal size paper in the Manual slot. Hit "Print"
You need to do these same steps again to return the settings to Letter size again.

Check your owners manual to see what the acceptable paper sizes are. Legal paper is 8.5"x14". If legal paper is listed in the acceptable paper sizes there should be a tray to handfeed this size paper. Look for the term "single sheet manual bypass" in the owners manual. I beleive this tray or slot is on the left hand side of the printer.

canon lbp 1210 printers
has a probleam a legal page setting
plese answerer legal page setting

For printing the Legal Size (8.5′x14′) in cannon LBP-1210, follow the instruction:
Step 1- Go to start
Step 2-printer and faxs
Step 3-select printer(Canon LASER SHOT LBP-1210)
Step 4-go to file
Step 5-select Server properties
Step 6-select creat new form (for legal page)
Step 7-give form name legal 1
Step 8-give paper size width 8.50in, hight 14.00
Step 9-give paper margin top 0.30in, left 0.30in, right 0.30in, bottom 0.30in
Step 10-select save form Step 11-then select advanced
Step 12-select informational notifications for local printers
Step 13-select apply
Step 14-then close
Step 15-select Canon Laser Shot LBP-1210
Step 16-select printer
Step 17-select properties
Step 18-select-select forms
Step 19-select change forms
Step 20-select legal 1
Step 21-select OK
Step 22-select apply
Step 23-select OK
Remember: 1 U need to set paper size (8.5′ x 14′) manually in the word documents and befor printing you need to set in printer properties "Legal 1′ for printing. Print preview may not show the whole page but the printer will print the whole page.
All the best.

Hi,
follw the given step and check- 
1-Before printing your document, be sure the page size is set to legal paper. Go to "File> Page Setup" and then click on the "Paper Size" tab. Select "Legal" from the drop-down menu.
 
2-Go to the printer and take out the paper tray. Remove the letter size paper.
 
3-Insert about one half of the package of legal size paper into the tray, depending on the depth of your tray. Larger printers can accept an entire package, while smaller ones cannot.
 
4-Make sure that the paper goes underneath the metal clips located at both the front and back of the tray.
 
5-For printers that don't have a tray, you'll have to manually feed the legal size paper. Locate the paper feed either on the front or rear of the printer.
 
6-Put a few sheets of legal size paper into the paper feed. The paper should be placed as close to the rubber spindles as possible. These spindles will draw the paper into the machine and feed it through the printer.
 
7-Print a test page.

Thanks,

when you give print command that time chage the paper size from a4 to legal in print proeprties and choose paper size legal.

you need to go to the printer set up on the desk top, there you can tell the printer what to do

no legal paper size

For printing the Legal Size (8.5′x14′) in cannon LBP-1210, follow the instruction:
Step 1- Go to start
Step 2-printer and faxs
Step 3-select printer(Canon LASER SHOT LBP-1210)
Step 4-go to file
Step 5-select Server properties
Step 6-select creat new form (for legal page)
Step 7-give form name legal 1
Step 8-give paper size width 8.50in, hight 14.00
Step 9-give paper margin top 0.30in, left 0.30in, right 0.30in, bottom 0.30in
Step 10-select save form Step 11-then select advanced
Step 12-select informational notifications for local printers
Step 13-select apply
Step 14-then close
Step 15-select Canon Laser Shot LBP-1210
Step 16-select printer
Step 17-select properties
Step 18-select-select forms
Step 19-select change forms
Step 20-select legal 1
Step 21-select OK
Step 22-select apply
Step 23-select OK
Remember: 1 U need to set paper size (8.5′ x 14′) manually in the word documents and befor printing you need to set in printer properties “Legal 1′ for printing. Print preview may not show the whole page but the printer will print the whole page.
All the best.
PARVEZ [ info(at)parvezbd(dot)com ]