Hello,

The only way I've found to modify the format for an existing numeric user field
is to delete it and re-insert it with a different format setting.

There is however an "Edit Fields" dialog accessible by double-clicking the
field, and in this dialog the field format can be selected... but the new format
seclected this way is not applied actually. This should be fixed.

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Procedure:
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- open new text document
- insert numeric user field:
     - open Fields dialog box (Crtl-F2)
     - select tab Variables (last but one)
     - select User Field in left Type list (last one)
     - select a numerical format (e.g. -1234.12)
     - enter some variable name (e.g. MyVar) and value (e.g. 3.14159)
     - click on Insert
     - close Fields dialog box
- double-click the field text in the document
- this opens the "Edit Fields: Variable" dialog box
- try to modify the numeric format for the field:
     - select another Format on the right (e.g. 1234)
     - click Ok

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Problem :
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The format is not changed...

I haven't tried if this is also the case with other types of fields (baybe not
only for user fields).