The dialog is accessed by right-clicking in the header of the Report Manager dialog (accessed by selecting Reports » Bill of Materials from a schematic or PCB document, among other manners) then choosing Select Columns.
Search - enter characters by which you want the list filtered.
Left icon - click to toggle between various view modes:
(All) - click to display all items featured on the list.
(Blanks) - click to display no items featured on the list. This feature will only clear the items in the Select columns dialog, not the Report Manager dialog.
(Non blanks) - click to display all items featured on the list, despite any previous alterations to items.
(Unchecked) - click to view all unchecked items in the list, which are denoted by the icon. Click the icon to uncheck an item.
(Checked) - click to view all checked items in the list, which are denoted by the icon. If an item on the list displays the icon, click it to enable the checked icon.
The columns may be filtered to only display checked, blank, non blank, unchecked, check, and all columns. When a view mode is selected, the icon will turn blue .
Right icon - click to open a drop-down from where you can choose the column to display. When a specific column is selected, the icon will turn blue .
List - this is a list of all possible columns that can display in the Report Manager dialog. When an item displays , that column will be displayed in the Report Manager dialog. When an item displays , that column will not be displayed in the Report Manager dialog. Click the symbols to toggle the show/hide function.
Up/Down - click to move the selected item up or down in the list. Only items that are checked may be moved. This determines the order in which the columns will appear in the Report Manager dialog.