Creating New Images - Adobe PHOTOSHOP 5.0 User Manual

54 CHAPTER 3
Getting Images into Photoshop
To identify and correct a color cast introduced by
a scanner:
Make sure that your monitor has been
1
calibrated. (See "Calibrating your monitor" on
page 82.)
Open a new Photoshop file, and use the linear
2
gradient tool (
black to pure white.
Choose Image > Adjust > Posterize, and
3
posterize the blend using 11 levels.
Print the 11-step gray wedge on a black-and-
4
white printer, and then scan it into Photoshop.
Note: You can also perform this test using an
18-percent neutral gray card or an 11-step gray
wedge from a photography store.
Open the Info palette, and read the RGB values
5
on-screen for each of the gray levels. Uneven R, G,
and B values indicate a color cast.
Use Levels or Curves to correct the color cast,
6
and then save the dialog box settings. (For instruc-
tions, see Chapter 6, "Making Color and Tonal
Adjustments.")
Open the scanned image you want to correct,
7
reopen the dialog box you used to correct the cast
in step 6, and load the saved settings.

Creating new images

The New command lets you create a blank,
untitled Photoshop image. You can also use this
command to create a new image with the exact
same pixel dimensions as an image or selection
that has been copied to the Clipboard.
) to create a blend from pure
To create a new image:
Do one of the following:
1
To base the image dimensions and resolution on
•
the Clipboard contents, choose File > New.
To base the image size on the default dimensions
•
and resolution or the last entered settings, hold
down Alt (Windows) or Option (Mac OS) as you
choose File > New.
To base the image size on an open window,
•
choose File > New. With the New dialog box open,
choose the image whose size you want to match
from the Window menu.
Type a name for the image and if desired, set the
2
width, height, resolution, and mode. (See "Color
modes and models" on page 63.)
For Contents, select an option:
3
White to fill the background with white, the
•
default background color.
Background Color to fill the image with the
•
current background color. (See "Choosing the
foreground and background color" on "Choosing
the foreground and background colors" on
page 214.)
Transparent to create an image containing a
•
single layer with no color values.
Note: Because images created with the transparent
option contain a single layer instead of a background,
they must be saved in Photoshop format. Photoshop
is the only format that supports layers. (See "Saving
files" on page 311.)