Adjusting the screen resolution

I recently switched from Remote Desktop Connection (RDC) to having Tessitura run from my desktop, and everything is huge!  Although I like the large font size, the scrolling is less appealing.

Is there a way to adjust the resolution?

My monitor has the resolution set to 1152 x 864.  When I tried moving to back to 1024 x 768 it only made things larger.

I have Maximize Windows checked under Tools|Preferences too.

Thank you,

Chris