3. Basics of PhotoLine / 3.3 User Interface Elements
Often double-arrow controls are placed at the right of a text field. The double-arrow allows to quickly increment or decrement the value of the text field. By holding Ctrl (Windows) or Command (Mac OS) while clicking on an arrow, the modification will be ten times larger. Holding Shift the modification will be ten times smaller.
Usually text fields with a double arrow can be modified using the mouse wheel. As usual: Shift reduces the step size, Ctrl (Windows) or Command (Mac OS) enlarges it.
If you hold the Ctrl key (Windows) or the Command key (Mac OS), you can change the value of a text field with double arrow by dragging.