diff --git a/core/client.js b/core/client.js
index ff4b6dd7..dd7cc2a4 100644
--- a/core/client.js
+++ b/core/client.js
@@ -221,6 +221,7 @@ class TfSparkLineElement extends LitElement {
 		this.min = 0;
 		this.max = 1.0;
 		this.lines = [];
+		this.k_values_max = 100;
 	}
 
 	append(key, value) {
@@ -236,23 +237,22 @@ class TfSparkLineElement extends LitElement {
 			line = {
 				name: key,
 				style: k_colors[this.lines.length % k_colors.length],
-				values: [],
+				values: Array(this.k_values_max).fill(0),
 			};
 			this.lines.push(line);
 		}
-		line.values.push(value);
-		if (line.values.length > 100) {
+		if (line.values.length >= this.k_values_max) {
 			line.values.shift();
 		}
+		line.values.push(value);
 		this.requestUpdate();
 	}
 
 	render_line(line) {
 		if (line?.values?.length >= 2) {
-			let points = [].concat(...line.values.map((x, i) => [100.0 * i / (line.values.length - 1), 10.0 - 10.0 * (x - this.min) / (this.max - this.min)]));
-			return svg`
-				<polyline points=${points.join(' ')} stroke=${line.style} fill="none"/>
-			`;
+			let max = Math.max(this.max, ...line.values);
+			let points = [].concat(...line.values.map((x, i) => [100.0 * i / (line.values.length - 1), 10.0 - 10.0 * (x - this.min) / (max - this.min)]));
+			return svg`<polyline points=${points.join(' ')} stroke=${line.style} fill="none"/>`;
 		}
 	}
 
@@ -834,18 +834,6 @@ function _receive_websocket_message(message) {
 	}
 }
 
-function keyEvent(event) {
-	send({
-		event: "key",
-		type: event.type,
-		which: event.which,
-		keyCode: event.keyCode,
-		charCode: event.charCode,
-		character: String.fromCharCode(event.keyCode || event.which),
-		altKey: event.altKey,
-	});
-}
-
 function setStatusMessage(message, color) {
 	document.getElementsByTagName('tf-navigation')[0].status = {message: message, color: color};
 }
diff --git a/core/index.html b/core/index.html
index 462e8c02..bdbd69b1 100644
--- a/core/index.html
+++ b/core/index.html
@@ -34,7 +34,6 @@
 						</div>
 						<div id="files_content">
 							<tf-files id="files_list"></tf-files>
-							<ul id="files"></ul>
 							<br>
 							<div><button id="new_file_button">New File</button></div>
 							<div><button id="remove_file_button">Remove File</button></div>