Selecting all the records in a table allows you to perform batch operations like copy, delete, and zoom to on all the records in the table. Selecting all the records of a feature layer will make it easier to see each feature's location since selected features are highlighted on the map.
- Right-click the table or layer in the table of contents and choose Open Attribute Table.
- Click Table Options in the Table window and click Select All.
You can also click the box in the top left corner of the table view next to the field heading to select or deselect all records.