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WTSupported in traditional Synergy on Windows
The PRINT_PREVIEW_SCROLL environment variable specifies what percentage of the display area to scroll (if it is scrollable) when an arrow key is pressed.
A number between 1 and 100, inclusive, that specifies the percentage of the display area to scroll when an arrow key is pressed.
The print previewer evaluates this environment variable each time the previewer is opened, so that setting the value programmatically can take effect on the next preview.
If PRINT_PREVIEW_SCROLL is not set, or if it is set to an invalid value, the value defaults to 5 (1/20th of the display area).
The environment or the [synergy] section of synergy.ini.
Synergy Windows printing API.
The following example from the synergy.ini file scrolls 10 percent of the display area when an arrow key is pressed: