Vantage21st
How To Re-Size An Image Using Adobe PhotoShop
Overview
Re-sizing an image and making it smaller reduces
both the physical and data size of the image. Many images scanned or found on
the net are just too large, they fill up most or all of the screen. Large images
will slow down your page load time causing visitors to leave your web site before
the page loads. For obvious reasons, this is not a good idea.
Smaller images are made up of less digital building blocks commonly called
"pixels," they contain less data or bytes. Smaller images will
load more quickly, holding the visitors attention to your page.
How To Change Image Size
The following
example assumes you have scanned, created or downloaded the image you want to
work with and the file is either a TIF, EPS, PSD, JPG or GIF. It is also assumed
that you have checked the resolution first and reduced
resolution to 72 ppi.
Procedure
- Open the image in Photoshop
- Open Image > Image
size
- The Image Size
dialog box will open
- Locate the Constrain Proportions and
Resample Image check boxes. If either box does not have a check mark
in it, click in the box to put an check mark in the check box. This will cause both
Width and Height values to change when either one is changed.
- In newer versions of PhotoShop there is a third check box Scale Styles. Uncheck this box.
- Next enter a new value
in either the Width or Height field. You will only need
to change one value as Constrain Proportions will automatically
adjust the other dimension proportionally preserving the proportions of
the original image.
- Click on the "OK" button.
In the example below, a Width value of 250
has been entered. Note that the "Height" value has automatically
changed to 376. When you change the "Width,"
the "Height" will change automatically. When
you change the Height, the Width will change automatically.
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Revised October 2005
Copyright 1999, 2006 John Sedgwick
All rights reserved