Each default pointer has a different hotspot, where an effect or action in the image begins. With most tools, you can switch to precise cursors, which appear as cross hairs centered around the hotspot.
In
most cases, the pointer for a tool is the same as the icon for that
tool; you see that pointer when you select the tool. The default
pointer for the marquee tools is the cross-hair pointer ; for
the text tool, the default pointer is the I‑beam
; and
for the painting tools the default pointer is the Brush Size icon.