There is another, less known, cause of text size changing that is not due to resolution changes.
From WonderWare Online Forum:
00032844 -- Text font gets resized smaller after enabling ClearType method to smooth edges of screen fonts (WinXP/2003 Advanced/Effects option). For example, Arial Regular 10 changed to Arial Regular 9. [Actual Results]
Text font gets resized smaller after enabling ClearType method to smooth edges of screen fonts (WinXP/2003 Advanced/Effects option). For example, Arial Regular 10 changed to Arial Regular 9. If you modify then save the window you may not realize that you have now changed the font. [Expected Results]
The ClearType display setting should not cause the font properties to change in an InTouch application. If this is an OS limitation, the issue should be documented. [Repeat Steps]
Repeatable with InTouch 7.11 P07, 8.0 SP2 P03 and 9.0 P01 on WinXP or Win2003. 1. On a WinXP or Win2003 machine, configure the Windows display so ClearType smoothing is NOT enabled: - Right click the desktop, select properties, go to the Appearance tab, click Effects. - Make sure "Use the following method to smooth edges of screen fonts - ClearType" is unchecked. Be sure to Apply the change if you have modified the setting. 2. In WindowMaker, add text to a window. Set the font properties to Arial regular size 10. Close WM saving the window when prompted. 3. Change the display settings so ClearType smoothing is enabled (see step 1) 4. In WindowMaker, open the window and check the properties of the text object. It has changed size 9. 5. Close WindowMaker WITHOUT saving the window. 6. Uncheck "Use the following method to smooth edges of screen fonts - ClearType" in the Windows Display/Advanced/Effects 7. Take a look at the text in WindowMaker - the font size is now 10. Close WM. 8. Enable ClearType - take a look at the font - it's size 9. Close WM this time SAVING the window when prompted. 9. Uncheck font smoothing - take a look at the text object in window, it's size 9. You have to manually change the font back to size 10.
From my own observations, having smooth edges ON does the following to graphics text:
To prevent this do the following:
This setting must be changed in Windows Display Properties, not in Wonderware.
Go to Windows Display Properties, Appearance Tab, Effects button.
Uncheck smooth edges of screen fonts.