PSD (Photoshop Document) – This file type is recommended if you plan on continuing your work at a later date or if you want to save your photo for archiving. Its ability to maintain and recall all your work including layers, masks, transparency, etc., makes it easier for you to carry on with your work!
GIF (Graphics Interchange Format): This format is not to be used if you are saving photographs since gifs are designed for graphics with solid colours. This format so not be used for saving photographs since its lacks of range of colours.
JPEG (Joint Photographic Experts Group): This is the standard for saving photographic images sine it compresses the file whilst still maintaining the quality. For the reason JPEG is one of the most widely used formats for photos on the Web .
PNG (Portable Network Graphics): The PNG can be used for photos but is best for saving graphics since they have the ability to display the transparency within a photo.
TIFF (Tagged-Image File Format): This is used to exchange files between applications and computer platforms. TIFF is a flexible bitmap image format supported by virtually all paint, image-editing, and page-layout applications. Also, virtually all desktop scanners can produce TIFF images. TIFF documents have a maximum file size of 4 GB.
SAVING FOR THE WEB
Photoshop has a built-in “Save for Web” feature which allows you to preview you photo before uploading it on the Web so that you can see how it will look like once uploaded to the Web. This helps to make sure that your photo will show up properly. If you have pictures with big file sizes it is recommended to compress those files- which means to shrink down the file size while maintaining a certain level of quality. This will help the pictures to load quicker on the computer whilst big files can take up a lot of time. If the picture is too big and takes up nearly the whole page, then you should also consider resizing it to a more appropriate size.