Scenario:
User wants to enter 20 characters data in a UDF. When the user enters the data, the data is visible but after entering the data, user can see 13 to 14 characters and the remaining are hidden.

More Information:
A text UDF can accommodate a maximum of 255 characters. However, a UDF field can show approximately 13 to 14 or more,  characters depending on the data type (Alphabets in lower/upper case, Numbers, Symbols & etc). The remaining characters are hidden by default and we do not have an option to increase the size of the UDF field. But all the information entered in the UDF can be seen on a report and even when a timesheet is printed.

Note: The above information holds good for the new smart interface as well.