The ability to save columns you have added to a list view does not exist, there is an ER to add this feature: View Records List
That said, there are two ways to customize the columns shown:
1. As an admin you can set the default columns in data model on the View
2. A user can set their own default columns and sort order for the View under Profile->Settings:
Keep in mind both of these options will set the columns for the View, not the dashboard. This means that once set, these will be the columns seen in any dashboard that uses the View in question. Also, the user default columns will override the data model default columns.I recommend reviewing Default Columns used for Record Lists in the Xtraction User Guide for further information.
Yes and no.
jfmascaro's reply is mostly right. There is actually a 3rd place to set default columns: under global administration settings.
I've create a document that explains the order in which Xtraction decides what field list designation to use when displaying a record list: How does Xtraction determine what fields to include in a record list?