How to Clip Vector layer with polygon in QGIS

A QGIS Tutorial showing how to clip vector layer using polygon.
To read the tutorial, please visit the following page:

[@niemandjemand2576]

if you could stop zooming, that would be awesome :D

[@diverseforelasningarinstru758]

Its impossible to see since everything is so small. Why do you have that layout, with the computer. Completly unnecessary