The Z-hop height is the extruder lift up height when moving between print areas. Choose minimum for fast printing process, but enough for prevent part edges hitting and as a result bringing and leaving beads on a part shell. Z-hop may lead formation of strings, however, it is usually easier remove this than removing beads.
![](https://support.anisoprint.com/wp-content/uploads/2018/12/ImgPlasticPlasticZHopHeight.jpg)