Resolution

Another thing to check when saving or printing images in the resolution at which the image is set to. Resolution refers to the number of pixels in an image, this is sometimes identified by the width and height of the image as well as the total number of pixels in the image. For example, an image that is 2048 pixels wide and 1536 pixels high (2048X1536) contains (multiply) 3,145,728 pixels (3.1 megapixels).   You can edit the resolution by going into the 'Image' tab on the menu bar, and selecting 'Image Size'.

You will then be presented with another option box allowing you to adjust the resolution (by changing the number highlighted in blue on the picture below). Here the resolution is measured in pixels per inch, 72 or 150 pixels per inch is a decent enough quality for printing test shots, any final images being printed should be done at 300 pixels/inch. 

Saving As...

In order to save an edited photo in PhotoShop, you must go to the 'File' tab on the menu bar, and select 'Save As' as pictured below:

After selecting this option, a box will appear which allows you to rename the image if needed, where on the computer you wish to save the image to, and also in which format to save the image, as below.

During the course, I will be using both JPEG, and TIFF formats. JPEG is most useful for saving test shots and experimental shots, as it keeps the physical size of the image but compresses it down so it is smaller and easier to store. The reason I will only be using this format for test shots is due to the fact that in compressing the files, it also reduces the quality of them, which is undesirable for final images or printed pieces. For these I will be using the TIFF format, as this format does not shrink or flatten the images, allowing them to retain any detailing and the sharpness of the image itself. The more detailed the picture, the greater the space it takes up, so only my very final pieces shall be saved as TIFFs. I may use PSD format whilst still in the editing stages of my final pieces, as PSD format allows images to remain detailed but are take up slightly less space as TIFFs. PSD is a useful format, but usually can only be opened within Photoshop itself.

After selecting the format in which you choose to save your work, you are then usually given the option to chose the quality of the file, You should always save to the highest quality possible so as to not lose any detail in the save. On the slider tool you are given this is usually represented by 'large file' and the numeric value should be '12' as below.

Renaming Images

In order to rename saved images, simply double click on the text under the picture (which will be the current file name). The file name should now be highlighted blue, and this should allow you to type over the current text with the new file name. Please see the screen grab below:

Creating A Contact Sheet