While editing a template, you'll see the Keyboard Shortcuts icon below the Description field:



If you click this, a dialog will appear that lists all the current shortcuts:


Tasks and Headings

Enter
Add new Task below current Task
CTRL
Enter
Add new Heading below current Task
SHIFT
Select a Task above current Task
SHIFT
Select a Task below current Task
Delete / Backspace
Delete current Task


Template Sections

E
Add new Text Editor section
I
Add new Image section
V
Add new Video section
F
Add new File section
C
Add new Checklist section
R
Add new Radio Button section
S
Add new Short Text section
L
Add new Long Text section
M
Add new Email section
W
Add new Website section
U
Add new File Upload section
T
Add new Dependent Template section
D
Add new Date section