I have a 7 inch Pyrex pie plate. How do I reduce the dough and the filling for blueberry, cherry, and chess pies? And time of baking and temp?? Help

I've done this a million times with mine - just divide the recipe by two and bake it that way. I don't change the baking temperature but you could reduce your oven by 25 degrees. Time of baking is recipe dependent; just check on it sooner and more often until it's done. A good recipe will tell you what to check for to know that it's done, not just a time, because everyone's oven and cookware is a little different.

Check out this article for help figuring out how to the reduce your recipes to fit your pan sizes: https://food52.com/blog/13239-how-to-make-your-baking-recipe-fit-your-pan-size