User Guide
Place your cursor over the area of the image you want to brighten or darken. Your cursor becomes
a double-pointed arrow. Left-click and drag the cursor up or down to adjust the amount of
brightening applied. Right-click and drag the cursor up or down to adjust the amount of darkening.
Adjusting the brightening and darkening does not cancel each other out, but helps to stretch the
contrast in the image. The stretch of contrast in the image simulates a High Dynamic Range eect.
The top half of the graph corresponds to
brightening, and the bottom half corresponds
to darkening. Tone levels of the shadows are
represented on the left, midtones in the middle,
and highlights on the right.
The light gray in the graph shows the amount of
brightening or darkening applied throughout
the image. The dark gray areas in the graph are
suggested boundaries for adjustment, and turn
red to indicate where you have adjusted far
enough to cause a loss in detail. When the cursor
is over the image, the two vertical yellow lines
correspond to the lower and upper bounds of
the tone level of the area under the cursor and
indicate the center of adjustment.
Copyright 2009 © ACD Systems International Inc. All rights reserved.
ACDSee Pro 3 tutorials: Making quick adjustments with the Lighting tool
Key concepts
Making quick adjustments
Opening an image
Automatically adjust the
image
Adjusting on the image