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PNG and GIFF
GIF is such a format that supports animation and transparency. See the related question for more details on the GIF format and some other formats that support one of these features.
i think it not supports any image format...
PNG is an image file format, such as JPEG or BMP. One of the differences between PNG and JPEG, is that PNG supports transparency.
Normally delete the background in the image then when saving, save with the transparent option checked. This will give you a transparent background. PNG is different than GIF format because with PNG you get 256 levels of transparency which allows you to smoothly blend your image to the page background on a webpage. GIF has only one level of transparency so you get a pixelated edge to your image.
A flattened image has only one layer. After the image is flattened, it has the same appearance it had before. The difference is that all of the image contents are in a single layer without transparency. If there are any areas which are transparent through all of the layers of the original image, the background color is visible. By flattening an image we introduce significant changes to the structure of the image. It is normally only necessary when you would like to save an image in a format which does not support levels or transparency (an alpha channel).
With your image editing software (try PaintDotNet) you can select the part you want to cut out and delete that. You must save the image in a format that supports transparency (such as .png)
Convert it to a format that does not support transparency (for example jpeg) or use a tool to edit the transparent pixel value.
most good image editors can make or edit both formats - they are both similar but each has advantages - gif can be used to make animations and has one level of transparency either on or off - png can have 256 levels of transparency and some image editors can work with pngs in millions of colors gif was the original internet image format but it was copyrighted and the creeps that designed it wanted to start charging everyone that used gifs a fee to do so - that is why png format was created, to give a free image format for the internet - but the attempts to collect fees for gif use didnt work and jpgs came along so the png format has been mostly neglected - but png format is a good one and all browsers as far as i know still support it
BMP or PNG of size smaller than 240X320.
They are file format for graphic. Each has different ways of handling, compression, transparency and scaling. tif = tagged image format jpeg = join photographic expert group gif = graphic interchange format
jpg (JPEG) is an image-file format. It is a style of compression readable by almost every computer nowadays. It supports a maximum image size of 65535×65535