[Marty]

Is there any way to resize and darken the text for desktop windows?

[bitsnpcs]

Hello Marty,

if you click - 
Menu>All>Appearance

The Style Tab you can pick the theme from a range of colours and shades in LL. If you d/l additional themes once installed these can also be selected from here.
The Font Tab will let you choose the font, and also select the font size.

[Marty]

Thanks
Was not sure it made the text darker. Did not notice the difference.

[bitsnpcs]

Hello Marty,

for the titles of windows you can use -

Menu>All>Window Manager

Click the Style Tab.
To make the text bolder on the right of the Style tab window click the number at the right of the font name, you can also change the font here that is used on window titles.

To the left of the pane in the Style tab, you can also change the Theme of the windows.