Can I add stroke to the texts?

If you want to add stroke to your texts, meaning something like  this, then you should go into the font manager:

and there you could enter a stroke css code to the "Extra CSS" option, like this one:

color: white;
text-shadow:
-1px -1px 0 #000,
1px -1px 0 #000,
-1px 1px 0 #000,
1px 1px 0 #000;

And that would create this effect on your text: