Notebook text Size

I have an HP Notebook. On Windows XP, at the bottom right on the Taskbar is an option for the screen size. 100%, 150%, 50% etc.

I have a program which is too big for my Notebook screen. Are there any ways I can reduce the size of the text as in XP, so that the program fits my screen?

There are a few buttons at the bottom of the program I need to get to but at present, I cant because it is too big for the screen.

Any ideas how I reduce it to 50% or 75% as in Windows XP?

Thanks.

Thanks for your advice.

I havealready tried the 1st few options without success.

I tried the regedit option & dropped the % to 50%. Rebooted the Notebook but the program is STILL too large for the screen. The butoon I need to click is about 1 inch below the bottom of the screen.

I am totally stuffed as I paid a lot for the program & I cant use it.

Any other ideas on how to reduce the size of the program?

Thanks,

Rob