Specify the maximal width for a long nonbreaking string (i.e. non-wrapping text) allowed to be left unbroken.
The purpose of automatic breaking of strings is to help MS Word to wrap those strings within table cells. When it is possible to estimate that for a given table configuration a string will fit into it without breaking, no breaking is actually needed (as it always distorts the original text).
Using the font face and size specified in the template, the RTF generator is able to estimate the width occupied by a string. It is also possible to determine the approximate maximum width available for a table.
This option specifies the percent of the table width in which any nonbreaking string should be wrapped.
For example, when the option value is 50, each long nonbreaking string placed in a table will be broken so to wrap within approximately half of the estimated table width. The 75 percent will wrap the strings into 3/4 of the estimated table width.
When the table is nested within other table(s), the topmost table is used as a base for the wrapping estimation.
The zero (default) value assigned to this option has a special meaning.
In that case, the percentage of the table width available for wrapping will be obtained from the "Formatting | Table Cell | Options | Max width allowed for long nonbreaking strings" setting specified in the template control that generates the given table cell (in which the string is placed).
In most cases, this actually allow for much better adjustment of the string wrapping. (However, even this is not waterproof -- the reason why this option is exposed here.)
At last, if the percentage value found in the template is 0, the default 50% is used.