The No Truncation field attribute should be used on a description field when the list view needs to display the max available text width. Setting the exact number of characters to display is however not possible.
ServiceNow lets users with the personalize_list role (including administrators) personalize the columns in any list to show only the desired information. You can add or remove fields (columns) from a list or change the order in which the fields appear in the list. You can hide controls and define access conditions by role to existing controls.
To personalize a list, bring up the list, right-click the list's header bar, and select Configure. For more information, see Personalize a List in the ServiceNow product documentation.
To adjust the column width to display the full contents of a column in a list view (i.e not truncate):
To apply this globally for every field:
As it is not possible to set the exact number of characters to display in a column, you can use CSS directives, to alter the column style, similar to field styles on a form.
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