How to increase Font size of RunFile/Selection In-line

After I press the (RunFile/Selection In-line) Komodo command. The output font display is small. How can I increase the font so it is more readable.

Unfortunately this is currently not facilitated, what you could do is install Stylish and customize it yourself with CSS. Note that at the moment Stylish is not yet compatible with our new package manager, so while you can install it using our package manager you need to use the old addon manager to interface with Stylish. You can do this by executing the following command in your console:

ko.windowManager.openOrFocusDialog("chrome://mozapps/content/extensions/extensions.xul", "Addons:Manager")

Then the CSS rule you could use is:
  font-size: 1.2rem !important;