Printing how can i make my printing in a big format?

check if the setting FORMAT CONVERT is with some numbers, please change for NONE.
This seting change the resolution from Printhead 200dpi or 300dpi or 150 dpi or none, none mins, if you have 200dpi printhead, print 200dpi resolution(small fonts). if have 300 dpi, print with 300 dpi resolution, if have 300 dpi(very small fonts) printhead, can print 150dpi(big fonts) if change this setting.
if ok, check the driver or your software.

The card may be too big or unsupported format for the card reader, thansfer your files to another card which works on the printer and print your pictures.

I think you can download it in PDF from http://www.abilityanswers.com/cefon-6380-user-manual-in-pdf-format-p-1894.html

Connect the printer to a different computer (laptop? desktop?)
and install the HP device-driver software, and try to print.
If it works correctly, then it's your computer that has a problem.

1. Create your graph on calculator.
2. Connect the calculator to the computer using one of the two methods: SilverLink Cable of the USB Direct Cable.
3. On the computer RUN the TIConnect Software.
4. In main window, find the TIScreenCapture icon (it is afflicted with a Camera and a curve graphed)
5. Click the TIScreenCapture and
   
6. save the image in jpeg or png format (bmp format file are too big)
   
7. You will be able to print it from the computer using an image editing software,
   
8. or insert it into a word document and then print the document.
   

this sounds like a driver issue. check the hp web site for the correct pdf driver and download and install new driver. hope this helps.

it is in the printer settings, try to do a print preview first....it will show you how it is going to be printed
from there you can change the settings to the format that you want

My print is too small. how can i fix this problem?

I was able to find the following error codes, however I realize they are for the Lextra tag QX50. I was unable to find codes for the Xr, so I e-mailed Dymo and will post a comment on this as soon as they get back to me.

For now, here are the QX50 codes, just in case they help:
LetraTag QX50 Error Codes Question An error is dispalyed on screen when I attempt to print a label with my LetraTag QX50. How can I resolve this?
Answer Error
Solution
Error 1
(Tape jammed or low battery)

• Replace the cassette
• Replace batteries

Error 2
(Big Font cannot be selected with characters in memory)

• Select another font size
• Select Big Font before entering text

Error 3
(Big Font cannot be selected with: box, underline, 2 line, or lower case)

• Select another style format
• Select another font size

Error 4
(Memory buffer is full)

• Delete some of the entered text

Error 5
(Text is bigger than defined length)

• Delete some of the entered text
• Specify a longer tape length

Error 6
(2 line cannot be selected with the format)

• Select another style format

I'm not sure but, my thoughts on the matter.
The camera my not support a 4 gig memory card, check the website or your owners manual for the size of memory cards supported. See what sizes of Memory they sell for it.
Formatting is NOT a big deal. You just have the camera do all that, just find where option that is.