When authoring content you can apply measurement values to various attributes defining the dimensions (length, width) at the element level. The best practice is to define measurement values in lowercase; entering the values in UPPERCASE may cause unexpected results in the generated output.
The standard units of measurement supported by the Requirements Editor include all valid CSS measurement units: %, in, cm, mm, em, ex, pt, pc, and px. You can use both absolute units (cm, mm, in, pt, and pc), font-centric units (em, ex), the pixel (px) and percentage (%) units. If a measurement unit is entered in UPPERCASE (for example, 1PT), the Requirements Editor will accept the value but will not assemble the document in a manner that produces the desired output.
Note: The Requirements Editor will not present a validation error or any indicator that a measurement value was entered as UPPERCASE and, as a result, the output is at risk of not producing the desired results.
