![]() At the top left of the dialog you will see "Channel" which gives you the options shown. This is a rather cryptic dialog box which can be a little confusing at first. Of course, Photoshop will also allow you to adjust and tweak all of these levels and settings manually, which can be needed sometimes if you are looking for a specific effect in a pictures - see below for instructions on the manual versions of Levels, Color Balance, and Contrast.Ĭlicking Image:Adjustments:Levels will bring up the following dialog. In images with very little variation between light and dark areas the auto-contrast feature will either enhance or smooth out these differences to make a better picture overall: Here, by adjusting the levels of each of the three primary colors individually the Auto Levels feature has been able to make the blue of the sky stand out significantly better from the red of the cloud than in the original. It will create a similar, but not identical, effect to the above Auto Color feature: Using the Auto Levels feature can adjust these setting automatically to improve the quality of the image. It is also possible that sometimes a picture can simply have too much of a certain color in it. The original image was very warm and orange looking and the Auto Color command cooled the image dramatically to create a perhaps more realistic looking picture. If you don't like the outcome, you can click Edit:Undo (Ctrl-Z) to undo the change. Photoshop will try to adjust the white balance to natural levels. With the file open, click Image:Adjustments:Auto Color. You can use the "Auto Color" feature to adjust this automatically. If an image seems too warm (too orange) or too cool (too blue) this generally means that the white balance is off. Luckily photoshop includes a lot of ways to correct these problems. ![]() These digital photo sources are still prone to the same issues of over or under-exposure, incorrect white-balance and hue problems. If your image is only slightly skew, then you can use the "Arbitrary" setting to rotate it by a specific number of degrees clockwise or counterclockwise.Ī lot of the time when getting images from digital cameras or scanners one may still encounter the same issues as you would if you had taken the photos with a film camera. Going to Image: Rotate Canvas will give options, all of them self explanatory to rotate your image. This can be rectified using the rotate tools: rotate canvas > 90° CCW]" height="282" width="258"> Many times you will take a photo with the camera sideways and need to rotate the image, or you will scan it in upside-down by accident. ![]() ![]() Secondly, make sure that the Resolution is set at 72 pixels/inch which is the standard for the web. Note, that while the Constrain Proportions box is checked, it will automatically adjust the height as you adjust the width and vice versa so as to keep the aspect ratio of the image correct. You can adjust the size of the image using the top two boxes for width and height. This will bring up the dialog box shown on the right. Once you have decided how big you would like your photo to be, go to the Image Size option in the Image menu (Left). However, if you plan on having it simply added as an element within your page, then you would make it considerably smaller, such as the pictures on this page. If you want it to be the focus of your web page, then you will probably want it to be relatively large. You should think about where you plan on placing your image in your web page. Open the image by using the File:Open command and selecting your image.īefore you do anything, to get an idea of the actual size of the image, click on the zoom box in the bottom left hand corner of the screen and adjust this value to 100% by typing in 100 and pressing the enter key. These instructions take into account that you already have an image to work with. Here we will go through a few of the basic steps that you will probably need to take before placing any images into a web page. One of the most common uses for Adobe Photoshop is to prepare images for use on a web page.
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