註 is a Japanese kanji written with 12 strokes, listed here under the keyword “footnote”. It is built from 主 (lord) and 言 (say). In Remembering the Kanji by James W. Heisig it is frame 2758.
On KumiJi Glyph Explorer, open the parts search and type “lord” + “say”. 註 is among the results, together with every other character containing the same shapes.
Open 註 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.