The keyboard icon ( ) next to the search box can be used to enter special characters directly. You may also substitute characters on a standard US keyboard, as shown below. Thus, for example, a search for Þē̆de is the exact same search as one for thede, and a boolean search for wīde OR wyde OR wyðe will return the exact same results as a simple search for wide, as all are considered equivalent for search purposes.
In total, the following sets of characters are considered equivalent when searching: