Array Ruler is a tool that copies an illustration that you drew in a 10 x 10 frame (max) into all of the frames.
Tap on ①the Ruler tool.
Select ②Array Ruler.
③Division X can be adjusted by dragging the slider left and right to change the number of horizontal divisions.
④Division Y can be adjusted by dragging the slider left and right to change the number of vertical divisions.
Drag ① to change the size. The frame to be copied is ②highlighted in orange. Tap to designate the frame to be copied. I have selected the frame in the lower right corner.③Lock the frame, and you can start drawing.
The illustration drawn in one frame...
...is now in all frames.