What is Play mode vs Build Mode?
What is the Move Tool?
What is the Arrow Tool?
What is the Comment Tool?
What is the Reaction Tool?
What is the Confetti Tool?
What is the Text Tool?
What is the Insert Image Tool?
What is the Zone Tool?
What is the Advanced Pointer setting for?
With the default pointer settings you can multi-select by holding Shift and dragging the selection net over the objects you want to select. This is useful for moving around many of sticky notes (or other elements) at once. When you click and drag without Shift you will either move the object you clicked or move the screen if you clicked on the board itself.
Enabling the Advanced Pointer will change this behavior so that clicking and dragging without Shift pressed will multi-select when you click on a free area of the board. If you are used to applications like Photoshop you might find this mode more comfortable.
You can still easily move around the board by dragging with right click or by pressing and holding the Space key and left click dragging. The latter is a standard interaction you will find in many canvas-like applications.