May I ask how you've achieved different font sizes and colors for different elements on the screen?
For different colors, going into each element's properties (right click) you can select background color, frame color, number color, etc, depending on which element (gauge, alphanumeric) you're selecting. I think you can only change the colors if you haven't previously gone into MODIFY DISPLAY > GENERAL DISPLAY SETTINGS and then selected for ALL items to have the same color for each property, although I'm not entirely sure about this.
As for font sizes, you can only set font style and size globally in the same GENERAL DISPLAY SETTINGS panel as above. If you're seeing different font sizes with any one item on my VWS screen layout, like "Moonrise" for instance, it is because that is how the item shows up as a default.
Hope that helps....
BTW way, it's too bad that "VWS Ed" wasn't able to add simple line or block drawing tools to ad the visual separators that I have on my screen. I was only able to achieve the black line separators by adding a large number of very rarely used alpha-numerics, like TOTAL RAIN AVG and INDOOR HUMIDITY LOW and then changing the color to all elements within that alpha-numeric to black and resizing the item so that it creates either a horizontal or vertical line. That is why you see that some of my lines are thicker than others. Hard to get them all the same, but it still works and help visually separate "like items" better.