diff --git a/src/variety/numlin.js b/src/variety/numlin.js
index 524b980d0..bb7adf351 100644
--- a/src/variety/numlin.js
+++ b/src/variety/numlin.js
@@ -16,7 +16,47 @@
 			play: ["line", "peke", "info-line"]
 		},
 		autoedit_func: "qnum",
-		autoplay_func: "line"
+		autoplay_func: "line",
+
+		dispInfoLine: function() {
+			var bd = this.board,
+				cell = this.getcell();
+			if (cell.isnull) {
+				return;
+			}
+
+			var number = cell.getNum();
+			if (number < 0 && cell.path) {
+				var numcell = cell.path.clist.filter(function(s) {
+					return s.isValidNum();
+				})[0];
+				if (numcell) {
+					number = numcell.getNum();
+				} else {
+					bd.border.setinfo(-1);
+					cell.path.setedgeinfo(1);
+					bd.hasinfo = true;
+					this.puzzle.redraw();
+					return;
+				}
+			}
+			if (number > 0) {
+				bd.border.setinfo(-1);
+
+				bd.cell.filter(function(c) {
+					if (c.getNum() !== number) {
+						return;
+					}
+					c.setinfo(1);
+
+					if (c.path) {
+						c.path.setedgeinfo(1);
+					}
+				});
+				bd.hasinfo = true;
+				this.puzzle.redraw();
+			}
+		}
 	},
 
 	//---------------------------------------------------------
@@ -80,7 +120,10 @@
 				var cell = clist[i];
 				g.vid = "c_sq_" + cell.id;
 				if (cell.qnum !== -1) {
-					g.fillStyle = cell.error === 1 ? this.errbcolor1 : this.bgcolor;
+					g.fillStyle =
+						cell.error === 1 || cell.qinfo === 1
+							? this.errbcolor1
+							: this.bgcolor;
 					g.fillRectCenter(cell.bx * this.bw, cell.by * this.bh, rw, rh);
 				} else {
 					g.vhide();
diff --git a/test/script/numlin.js b/test/script/numlin.js
index e7f0e404b..c77293f87 100644
--- a/test/script/numlin.js
+++ b/test/script/numlin.js
@@ -45,21 +45,76 @@ ui.debug.addDebugData("numlin", {
 		/* 問題入力はnurikabeと同じなので省略 */
 		/* 回答入力はmashuと同じなので省略 */
 		/* AreaLineManagerでエラーしないか確認 */
-		{ input: ["newboard,5,2", "playmode"] },
 		{
 			input: [
+				"newboard,5,2",
+				"editmode",
+				"cursor,7,1",
+				"key,1",
+				"cursor,3,3",
+				"key,1",
+				"cursor,9,3",
+				"key,2",
+				"cursor,1,3",
+				"key,2"
+			],
+			result:
+				"pzprv3/numlin/2/5/. . . 1 . /2 1 . . 2 /0 0 0 0 /0 0 0 0 /0 0 0 0 0 /"
+		},
+		{
+			input: [
+				"playmode,auto",
 				"mouse,left, 1,1, 7,1",
 				"mouse,left, 3,3, 9,3",
 				"mouse,left, 5,1, 5,3",
 				"mouse,right, 6,3, 5,2"
 			],
 			result:
-				"pzprv3/numlin/2/5/. . . . . /. . . . . /1 1 1 0 /0 1 -1 1 /0 0 -1 0 0 /"
+				"pzprv3/numlin/2/5/. . . 1 . /2 1 . . 2 /1 1 1 0 /0 1 -1 1 /0 0 -1 0 0 /"
+		},
+		{
+			label: "Highlight lines",
+			input: ["playmode,info-line", "mouse,left,3,1"],
+			result: function(puzzle, assert) {
+				var bd = puzzle.board;
+
+				assert.equal(bd.getc(1, 3).qinfo, 0);
+				assert.equal(bd.getc(9, 3).qinfo, 0);
+				assert.equal(bd.getb(8, 3).qinfo, -1);
+
+				assert.equal(bd.getc(7, 1).qinfo, 1);
+				assert.equal(bd.getb(2, 1).qinfo, 1);
+				assert.equal(bd.getb(4, 3).qinfo, 1);
+			}
+		},
+		{
+			label: "Highlight lines by clicking number",
+			input: ["playmode,info-line", "mouse,left,1,3"],
+			result: function(puzzle, assert) {
+				var bd = puzzle.board;
+
+				assert.equal(bd.getc(1, 3).qinfo, 1);
+				assert.equal(bd.getc(9, 3).qinfo, 1);
+				assert.equal(bd.getb(8, 3).qinfo, 1);
+
+				assert.equal(bd.getc(7, 1).qinfo, 0);
+				assert.equal(bd.getb(2, 1).qinfo, -1);
+				assert.equal(bd.getb(4, 3).qinfo, -1);
+			}
 		},
 		{
-			input: ["mouse,left, 5,1, 5,3, 7,3"],
+			input: ["playmode,auto", "mouse,left, 5,1, 5,3, 7,3"],
 			result:
-				"pzprv3/numlin/2/5/. . . . . /. . . . . /1 1 1 0 /0 1 1 1 /0 0 1 0 0 /"
+				"pzprv3/numlin/2/5/. . . 1 . /2 1 . . 2 /1 1 1 0 /0 1 1 1 /0 0 1 0 0 /"
+		},
+		{
+			input: ["mouse,left,7,1,5,1,5,3", "playmode,info-line", "mouse,left,1,1"],
+			result: function(puzzle, assert) {
+				var bd = puzzle.board;
+
+				assert.equal(bd.getb(4, 1).qinfo, 1);
+				assert.equal(bd.getb(8, 3).qinfo, -1);
+			}
 		}
 	]
 });