Hello. I recently purchased Broken Sword: Shadow of the Templars (Director's Cut) here on gog.
When I start the game I notice there are 3 screen sizes to chose from, so I chose the full screen option,
but its cropped.
I can barely read the text since it's too small... (Already have glasses)
Help will be much appreciated.

If by cropped, you mean pillar-boxed (black bars on left and right sides), then you're out of luck. BS1:DC is a crap mobile port. It does not support any widescreen aspect ratios, only standard 4:3. You're better off playing the original version (which you already have since on GOG it's comes bundled with DC), which runs through ScummVM so if you fiddle with the settings you can easily make it fill the entire screen, and the font is considerably larger than in the remake.

Here's some more info on the DC version:
[url=http://pcgamingwiki.com/wiki/Broken_Sword:_Shadow_of_the_Templars:_Director%27s_Cut]http://pcgamingwiki.com/wiki/Broken_Sword:_Shadow_of_the_Templars:_Director%27s_Cut[/url]

And here's an example of the font in the original version:
http://static.giantbomb.com/uploads/original/0/5007/296837-1181485703_00.gif

Alright, thanks a lot. Long story short I took your advice and played the original classic.
Not only did it aged well, it's superior over the directors cut.
Again, thanks for the info!

right klick on bs1dc.exe
and aktivate 640x480 resolution.
have fun.