Step 2:
Enter animation name. This field is required.
You can leave the word "Animation" if you don't want to write anything.
Step 3:
Enter frame interval in milliseconds. This field is required.
You can leave "500" if you don't want to write anything.
Step 4:
Enter animation width and height in pixels. These fields are optional.
You can leave it empty. In this case the system will find an average size based on
added frames.