Selecting and unselecting a group

To select all time blocks in a group, click on the group title in the left column for the group you want to select.  A pop up menu for that group will appear.  Choose Select all time blocks in this group.

Then all time blocks in the group you chose will be selected.

To unselect all time blocks in a group, click on the group title in the left column for the group you want to unselect.  A pop up menu for that day will appear.  Choose Unselect all time blocks in this group.

Then all time blocks in the group you chose will be unselected.