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#'''Filesize:''' Images should be of the minimum quality that is needed for the site, and file size should be as small as possible. JPGs saved with 70% or 80% quality are recommended. The image should be have too many pixels on either side (for example 2000 pixels). For very small images and icons, use the GIF format unless you plan to resize it. Use other image file formats (PNG for example) only if you have to. You can use online image processing websites ([http://www.picresize.com/]) for reducing the file size or image dimensions. Ideally it should contain letters, numbers, dashes and underscores only. Dont use commas and ampersands (&).

#'''Filenames:''' Use a filename that's not too long (a few words for example). A long file name will cause problems in site backups as some systems do not accept files with names that are too long. Make sure there are no foreign characters in the filename. If you're not sure about that, the best way to write a filename is to delete the original name and make up your own.