Hi JustBenj,
Unfortunately, that can't be done as these are hard-coded into the system and cannot be configured. I'm frankly surprised you were even able to change the font, but I imagine that is there to assist people by allowing perhaps a larger font for those with vision problems.
Sorry, but you've gotten as much format/style/color/appearance change as the system has to offer concerning those alerts if you made all the adjustments available where Imperfect1 suggested.
If you consider the issue closed (even if the answer was that you can't make any further changes), don't forget to close out the thread by clicking the far right triangular icon at the top of your post and typing "solved" in the box and submitting it. The moderators will notice and put a green check next to the thread title. That way others seeking answers by searching the forums will know that this thread contains a solution to the issue identified in the title - and people seeking to help will not waste time checking out this thread since it has been resolved.
And welcome to Vista Forums! Now that you know where we are, bookmark the site and post anytime you have further questions or problems or if you just want to browse and learn (especially the Tutorial section offers some excellent advice on a wide variety of topics) or even if you want to try to help answer a question if you happen to see one where you know the answer and it hasn't already been posted. While it most likely won't be us the next time (though it might), there are many very skilled, experienced, knowledgeable, and friendly people here who, like us, volunteer their time to help others and one or maybe even several will respond to your post to assist you. While there are other forums on the web that do this sort of thing, you've now found what I think is the best (and I've posted in and/or checked out quite a few) so don't lose this link - you never know when it might come in handy again.
Good luck and best wishes.
