Use Word Sifter when the specialized helper tabs do not quite fit the lookup. Start with the broadest letter constraint you know, then add only the filters you need.
Put letters that may be used in Letters Available. Add letters that every match must contain to Letters Required, and letters that must never appear to Letters Excluded. In the available-letter field, . acts as a wildcard.
Use Starts With, Contains, Ends With, and the length fields to describe the shape of the words you want.
Check Tile Rules? when each available letter may be consumed only once. In that mode, . creates a blank tile in Letters Available. Check Require All Letters? when every available letter must appear in each result.
Leave Board Letters Count As Available off for ordinary prefix, contains, or suffix lookups. Turn it on only when letters in Starts With, Contains, and Ends With should also consume the available-letter pool, such as letters already fixed on a board.
Use Board Pattern to look for words around fixed letters in a row or column. Letters are fixed positions. Use . for open positions.
A board pattern replaces Starts With, Contains, Ends With, and the length filters for that search.
With Letters Available set to WANET and Board Pattern set to .ALL.BY....THE., matches can include WALL, BYTE, and THEN.
After a search, use Group By, Sort By, and Score System inside Results. These controls rearrange the current matches immediately without running the search again.