There are two ways to unhide columns:1. Click the "Columns" button above the table and either:
โข Toggle individual columns on to show them
โข Click "Show All" to display all hidden columns
2. Or you can:
โข Right-click a column
โข Select "Columns" from the menu
โข Toggle columns on/off or click "Show All" to adjust the entire table
Sources:Hide, Re-order, Sort, Filter, Merge ColumnsCustomizing your table view | Documentation | Clay University