Messages Read and Program Wide Font Size

Two questions:

  1. Is there any way to set the program to change the bold message header in the inbox to regular when I click on it? As it is now, my choices are either not to change it at all or for the program to change it to read automatically after a certain period of time.
  2. How do I increase the font size on everything except messages in the inbox (which I can control), such as column labels (delete, reply, forward), etc., and everything in the settings page, dropdowns, compose window, etc.? I must use a magnifying glass to read anything in this program.

Using ver. 10.1.4588