Want to find something? Write it to the Famous text entry and press Enter or Ctrl-F. Want to Find next? Press F3. Note that TEA always search from the current cursor position.
If you need more traditional search tool, you can use the Search and Replace window. It is far from the ideal, but somehow usable.
Goto line - enter the line number into the famous text entry, and use this function.
Replace all - again, dealing with the Famous text entry. But now in a special format: text to find~text for replace. For example: hell~heck.
Scan for local links - scans current document for href-links to local files, and add them (if any) into the menu Nav > Links, from which you can open a text file in TEA, and a picture in the built-in or external viewer (like a Open at cursor).
Scan for SRC's - similar to Scan for local links, but now it fills Nav > Links menu with all local SRC-stuff - for most cases with images. It's very useful if you want to see some banner or another picture and don't want to find it in the code manually.