What do the icons on the Words screen do?

Short answer

The ··· menu at the top right searches, selects and filters, and the button next to it repeats whichever of those you used last. The flag switches the language pair, the small count above the title shows how many words are on screen, and the field above the list is where you type a new word.

··· (top right): The menu for the list. Search looks through words, context sentences and tags. Select puts the list into bulk selection mode so you can manage several words at once. Filter opens the Filter sheet, which narrows the list by tag, by level and by usage label.
The button next to it: Search, Select or Filter, whichever you used last, so the one you need most is a single tap away.
🇪🇸 Language flag (top right): Shows the pair you are working on. Tap it to switch to another language pair.
Word count: The small number above the title. It shows how many words the current filter and search leave visible, not the whole pair. Tap it to jump back to the top of the list.
The word field: Above the list. This is where you add a word. It is hidden while you are selecting, and the search field takes its place while you search.

Long-press a word card and a short menu appears with Share Word, Tags and Delete, so a single word no longer has to go through bulk selection. The menu is off while you are selecting.

Still stuck?

What do the icons on the Words screen do?

Words