On the dashboard, you will notice checkboxes on the left. By selecting the check boxes and clicking on the actions button, you can perform various actions to the selected rows such as assigning them to a group or deleting the entries.
For the Vehicle dashboard,
For the Job > Deliveries/Collections dashboard,
In particular, you will find the assign/unassign vehicles, assign group and change date function to be helpful in arranging jobs.
The action button allows you to update multiple jobs quickly without having to go into each individual entry and changing the information from there.