Equation regression line

When I use the regression line for a graph, I often want to have the equation displayed as well, but the default setup for the equation label makes it almost invisible. Every time I have to enter the setup, add a background color, enlarge the font and move it to a convenient place.

Is there a way to change this default?


NSV

The MS-Office on my computer is not in english, so perhaps I use a wrong term - what about "trend line"?