Autoflow is a plug-in that allows you to easily connect shapes and frames with arrows.
auto flow.
Launch Autoflow. Display the "Autoflow" panel and set the color and thickness of the lines, as well as their start and end positions.
With this panel displayed, select a frame at the start position, then select a frame at the end position while holding down the "shift" button.
A line will then be automatically drawn at the timing of the selection.
Once connected, the arrows will follow even if the frame is moved, which is very convenient.