No outlining required
the next one will be on how to color your super lazy lineart
This could have been done as "step" 3, without the use of the "Select by Color" tool. Then save as a png image.
Also we can skip the "save by file type" option if we know what file type we're saving in. Just type ".png" (without quotation marks) at the end of the files name and press "Enter".
The quickest way I've found to remove the white background from a black and white piece of line art using Gimp, is to navigate to Layer>Transparency>Color to Alpha, and use white as the color. This will remove any white from the image.
IMO... this works best on black and white line art.
Note: To ensure that the whit background does not contain any other color anomalies. I would suggest you first desaturate the image, then apply Color Curves to your image. Moving the curve line to increase the white values of the image.
(Moving the upper most portion of the curve line, along the top within the Color Curves dialog, will increase the white values of the image.)
Using Color Curves is not essential, however desaturating the image will ensure that the image doesn't contain any color anomalies.
Try this method and let me know how it worked for you.
I mostly work totally digital, but, I'll find a use for this eventually. Thanks for the work!
The delete trick didn't work for me though. No matter how many times I pressed delete in different ways, the white wouldn't delete.
I read the comments and I ended up going to Colors, and using the Color to Alpha setting. whatever alpha is. xD