# pmouse_y
The system variable `pmouse_y` always contains the vertical position of the mouse in the frame previous to the current frame.
## Examples
```python
# move the mouse quickly to see the difference
# between the current and previous position
def draw():
py5.background(204)
py5.line(20, py5.mouse_y, 80, py5.pmouse_y)
py5.println(py5.mouse_y, ":", py5.pmouse_y)
```
## Description
The system variable `pmouse_y` always contains the vertical position of the mouse in the frame previous to the current frame.
For more detail on how `pmouse_y` is updated inside of mouse events and `draw()`, see the reference for [](sketch_pmouse_x).
Underlying Processing field: [pmouseY](https://processing.org/reference/pmouseY.html)
Updated on March 06, 2023 02:49:26am UTC