Set frame delay (duration)

To set frame rate

Select animation frame(s) whose delay (duration) you want to change.
Open Frame Properties tab.
Enter delay (duration) into Delay box. Time must be specified in 1/100 of a second increments (50 = 0.5 sec, 100 = 1 sec and so on).

Note

You can select all frames with a keyboard shortcut Ctrl+A.