Version 0.3.5 for the GRUB2 Bootloader Editor was released. New features are:
Create GRUB splash images:
Create GRUB splash image dialog & options.
Which is accessible using the ‘Create’ button next to ‘Preview’:
Create GRUB splash images.
Another new thing is Kernel Arguments & Terminal Suggestions (in the ‘Advanced’ tab):
Normal Linux entries Suggestions.
All Linux entries Suggestions.
Terminal Suggestions.
Input Terminal Suggestions.
Output Terminal Suggestions.
I think it’s time for some text, enough screenshots 
Creating a GRUB splash image is as easy as selecting the image you want to convert, select where to save the result and specify a resolution. The image resolution should match your GRUB resolution for better results. The ‘Force Resolution’ option ignores the aspect ratio of the image if checked and ‘Set As Wallpaper’ immediately sets the converted image as your GRUB wallpaper.
The purpose of ‘Suggestions’ is more of descriptive rather than assistive. They can give you a small description of some fancy GRUB/Linux Kernel keywords.
Kernel arguments Suggestions include quiet booting (supress messages), boot with a splash image (disabling it gets you back to text booting), and some other not-so-common-and-rather-weird options such as disabling ACPI and/or (Local) APIC (sometimes required when you are unable to boot and you get some strange ACPI-related messages) and booting into single user mode (mostly for troubleshooting).
Terminal Suggestions include some rare options (which I won’t mention here – they can be seen in the screenshots above) along with some other quite important: ‘Graphics Mode Output’ -for the Output Terminal- which must be set in order to customise GRUB’s appearance (colors/wallpapers/themes) and ‘PC BIOS & EFI Console’ which is the regular text console. Setting the ‘Terminal’ field overrides both Input and Output Terminal fields’ values.
Finally I have to mention the fact that previewing splash images is now done full-screen (gives you better understanding of how the image will look like in GRUB menu).
Changelog Quote:
v.0.3.5 (31/03/2011)
——————–
*ADDED: Splash image creation dialog.
*ADDED: Linux Kernel parameters suggestions.
*ADDED: Terminal suggestions.
*FIXED: Reload configuration after updating GRUB.
*FIXED: Preview GRUB wallpapers (=splash images) fullscreen.
Hi,
You’re doing a great job. Keep it up.
One issue, the post screenshots don’t view.
Greetings
sorry, yes now.
Thanks for feedback. Any ideas would be highly appreciated as well.
This is fantastic news! Last year, I tried setting a background image manually, and while I managed to do so, it was a bit of a pain…
I would really like to have any messages during boot displayed in a confined area of the screen and use a fontsize that prevents wrapping of longer lines. So I hope it will be possible to set font size for messages as well.
Regarding resizing – I am used to work with images for TV and I used the same trick that we used there to make my image fit my screen without warping:
My screen is 1280×800 and for some reason, this resolution do not exist in the GRUB2 settings (at least it did not when I tried). So I was forced to set it to a different resolution, make a 1280×800 image, the resize it without a locked aspect ratio to the GRUB2 size. If I understand it correct, this is what your “Force” option do?
For custom font size you should use/write a GRUB theme (http://www.gnu.org/software/grub/manual/grub.html#Theme-file-format). Unfortunately as far as I know GRUB themes are still quite experimental and you won’t find many.
“Force Resolution” means that the output image will be exactly of that resolution (it ignores the aspect ratio if it has to). This may possibly lead to distorted images, that’s why it is generally reccommended that the image has the same aspect radio with your screen. More details here: http://www.imagemagick.org/Usage/resize/#noaspect