How can I select several records to do various tasks like adding records to mailing labels database?

When a list is displayed, hold the CTRL key and click on the record to wish to select. To select multiple records, keep holding the CTRL key and select the records. If you wish to select a block of records, hold the Shift key and click on the first record, then click on the last record you want while still holding the shift key

Example 1: On accounts list, select records and add to mail database, then you print the labels.

Example 2: Go into Audit list and select records and you want to delete, the click the Delete button.

Hint:
If you want to highlight all records, click the first record, then hold the Shift key, then press the Page Down key until you reach the end of the list.