This course includes many photographs, almost all taken by me (© Nigel
Ward). Most of them are quite large and are designed to be downloaded over a
fast (DSL) Internet connection. If you only have a modem connection, you're
going to need a lot of patience... In
order to work with these images, right-click them and choose
Save a Copy in order to save the image to your computer (if you are working in
the CIV computer rooms, then you should save the image to your personal folder in the way that I have shown you). Remember where you saved the
image, then open it from within Photoshop.
Before you get started, here's a useful tip: Photoshop uses a lot of floating
'palettes' as well as a toolbar, and the screen can easily get very crowded and
begin obscuring your picture - you should hide all the palettes when they are
not needed by pressing the TAB key - press the TAB key again to show the palettes
when they are needed. Also, even if you are used to using menus rather than
keyboard shortcuts in other programs, it is worth getting into the habit of
using keyboard shortcuts for common operations in Photoshop, for they can save
you a lot of time. Here are the shortcuts that I recommend you learn NOW - try
to use them systematically rather than using menus or palettes. The shortcuts
for zooming in and out are particularly useful - it's important to realize that
zooming doesn't actually change the size of the picture, any more than looking
at a bird through binoculars makes the bird bigger. It just makes it seem
bigger.
 | To hide all visible palettes (and then show them again): Tab |
 | To hide all visible palettes except the toolbox: Shift-Tab |
 | To zoom in on an image: Ctrl-Space-Click (this is better than Ctrl- +
since it lets you choose which part of the image to zoom in on) |
 | To zoom out: Ctrl- - |
 | Move: Ctrl-drag |
 | Fit image to screen: Ctrl- 0 (or Ctrl-$ for the French version) |
 | Adjust Levels: Ctrl-L |
 | Adjust Curve: Ctrl-M |
 | Undo last change: Ctrl-Z (but see below) |
 | Select all: Ctrl-A |
 | Add to existing selection: Hold down Shift while making selection |
 | Subtract from existing selection: Hold down Alt while making selection |
 | Cut: Ctrl-X |
 | Copy: Ctrl-C |
 | Paste: Ctrl-V |
 | Copy selection to new location: Ctrl-Alt-drag |
 | Deselect a selection: Ctrl-D |
 | Save: Ctrl-S |
Undoing Mistakes
Brilliant student though you may be, it's just possible that you may make a
mistake or two during the course of these lessons. Luckily for you, recent
versions of Photoshop (versions 5 and above) have very powerful 'undo'
features. Edit > Undo or Ctrl-Z will undo the
LAST change that you have made but you can undo up to 99 steps by using
the History Palette (in the Windows menu)!
If you want to to revert to the image as it was when it was last saved then
choose Revert in the File menu.
Save your work regularly
You should be able to produce some beautiful, high-quality work in this class
and you won't want to lose it, so save your work at least every 10 minutes
(Ctrl-S). In this way, even if your computer crashes, you can be sure you will
never lose more than 10 minutes' work...
Work-in-progress should normally be saved in Photoshop's PSD format
which will save with no loss of image quality and record all the details about the
image. However, PSD files are very large and therefore once the image is
finished you should save it in a compressed format such as JPEG. When
saving in this form, there is a small loss in picture quality - you can control
this by adjusting the balance between small file size and high picture quality -
a setting of about 7 is recommended for this class.
Use meaningful names when you save - it will make it easier for me to locate
and grade your work.
A note about resolution
If you were to look at a computerized image with a magnifying glass, you
would see that the image is made up of tiny squares. These squares are called
picture elements, or 'pixels' for short. Picture 'resolution' refers to
the number of pixels that make up the picture, and thus the level of detail that
the picture contains. The images that we will use in these lessons are usually
about 800 pixels wide and 600 pixels tall (note that this gives a ratio of 4:3
which corresponds to the shape of your computer screen). The resolution of such
a picture is 800 x 600 = 480 000 pixels or about 0.5 megapixels (1 megapixel = 1
million pixels). This is a good size for learning to use Photoshop (assuming
your screen is set to a resolution of at least 1024x768), but this would
be rather large to include on a web page since it would take a long time to
download over a conventional modem connection (the jpeg file size would be about
200KB). Pictures on web pages should not normally exceed about 100 000 pixels or
about 40KB.
Pictures that are destined to be printed, on the other hand, need to have a
much higher resolution, for printers are capable or reproducing much finer
detail than computer monitors. Many digital cameras have a resolution of 2 or 3
megapixels (file size more than 1 MB), and this will give a good result when
printed even up to A4 size.