Help me figure out the animation file.

The github example has a section called
In my understanding, this section adjusts the settings with which the panel should start at the time of loading.
But if I specify the specific size of the field for the sensor in the section, and then shift the position of the sensor, then at boot time the sensor will not return to the coordinates specified in
In addition, this section is not explained in the description …
How to work with her? What is for?

Actually the ‘boot’ section is not used for anything. Its an old leftover. Will fix materials on GitHub.