The part of speech filter can be used to include or exclude certain parts of speech from the context of the word.
In the screenshot, the user excluded adverbs and adjectives one token to the right of rather.
window can be set to left, right or both
tokens specify a window, not an exact position, when set to 4, it means between 1 and 4 tokens from the search word
none of these items – none of the ticked PoS should appear
any of these items – at least one of the ticked PoS must appear in the window
all of these itmes – all of the ticked PoS must appear in the window