--- a/s4-main.js	Wed Mar 06 09:37:52 2024 +0900
+++ b/s4-main.js	Wed Mar 06 09:49:08 2024 +0900
@@ -966,10 +966,16 @@
 	//(2) Prepare sort
 	let warn = document.querySelector("tr.warn span.warn");
 	if (blogheadtd && warn==null) {
-	    let umode = "UserSORT", amode = "ArticleSort";
+	    let umode = "byUser", amode = "byArticle";
 	    let sbtn = document.createElement("button");
 	    sbtn.textContent = umode;
 	    sbtn.type = 'button';
+	    sbtn.accessKey = "o";
+	    sbtn.title = `Shortcut: O
+書き込みを著者順に並べ替えます(全件表示時のみ)。
+特定のユーザの書き込みを探すときに有用です。
+Sort articles by UserID or ArticleID.
+Handy at searching for articles by certain user.`;
 	    let spacer = document.createElement("span");
 	    spacer.textContent = " ";
 	    let hide = document.getElementById("hideauth");