To select all contacts in the database at once, just click on the empty square at the beginning of the row with the column names. After clicking, all contacts will be selected automatically.
You can select contacts one by one by clicking the empty square next to the name.
Thanks to selecting contacts, you can add or remove a label in bulk, export contacts, edit them in bulk, share, lend, transfer, or even delete them.
We cover all the options in separate articles here in the guides section in Contacts (CRM light