You can find options for the project-wide appearance and position of playing techniques on the Playing Techniques page in Engraving Options.
The options on the Playing Techniques page allow you to change the distance between playing techniques and the staff, the arrangement of multiple text playing techniques at the same rhythmic position, the default horizontal offset of text playing techniques, and playing technique continuation styles. You can also change whether playing techniques on grace notes appear smaller.
There are musical examples for many options to demonstrate how they affect the appearance of your music.