To select one or more reminders, do any of the following:
Select a reminder: Move the pointer to the right of the reminder’s name, then click the blank area.
Select multiple reminders: Press and hold the Command key, then click to the right of each reminder’s name.
Select multiple reminders that are next to each other: Click to the right of the first reminder’s name, press and hold the Shift key, then click to the right of the last reminder’s name.
Select all reminders in a list: Select a single reminder, then press Command-A.