When making a Data Field a Type Calculation, make sure the results is the proper Type. The choices are Text, Number, Date or Time. For Numeric data there is a choice of leaving the data as entered or putting commas in for thousands separators, adding a dollar or percent sign, and specifying the number of decimal places to be used. There are also other options that may be made. Date and time have their own set of options.
Pictures have alignment and sizing options.
Because different systems may have different fonts, use standard fonts such as Helvetica. If you get too fancy, you may cause problems for other users. If this is not done, some technologies produce a wider text and your text will get cropped or will wrap around to the next line. When you have multiple layouts, it is easy to make changes and forget to change Buttons on those layouts and other layouts that are affected by the changes. Also, you may need to wait until other areas are developed before designating a Button and then forget about it.