The first page of the original Bullet Journal® is used to display a legend (key). Ryder Carroll already created some icons for this, which users often modify - after all, the method he invented is an individually adaptable system.
An example of a to-do list: The normal bullet points (resulting from the dotted ruling) are used for listing individual tasks. If you want to make a to-do list for the current day, all items are listed one below the other.
To mark a task as completed, the dot is changed to a cross. If an item on the list is not completed and moved to the next day, this item becomes an arrow pointing to the right. There are many possibilities, as individual as the international community that has embraced the Bullet Journal® as its own and exchanges ideas on a global scale. Numerous other ideas and helpful videos on the subject can be found at www.bulletjournal.com.