Well what I really wanted is to capture a selection and show it directly on the desktop.
The normal shortcut (shift command 4) only captures and saves the selection but doesn't show it directly on the desktop.
So I made on my old Powermac with the application Spark Deamon a script for key F16. And put Spark Deamon in the "login items"window in System Preferences.
But in Preview in OS X 10.5.8 on the powermac It was "Grab" instead of now it is " From Selection… so I couldn't get it to work because of what I thought were 3 dots.
Now with the ellipsis it works again. Thx again.
The script is :
tell application "Preview"
activate
tell application "System Events"
tell process "Preview"
tell menu bar 1
tell menu bar item "File"
tell menu "File"
tell menu item "Take Screen Shot"
tell menu "Take Screen Shot"
click menu item "From Selection…"
end tell
end tell
end tell
end tell
end tell
end tell
end tell
end tell