diff --git a/app/modifiers/ui_select.js b/app/modifiers/ui_select.js
index ecce28bd249479f3a02bdca2729d8104bbbf2b8b..56b47c6ae2fb070a07ea7aec203d14966039aa45 100644
--- a/app/modifiers/ui_select.js
+++ b/app/modifiers/ui_select.js
@@ -53,23 +53,21 @@ class UISelect {
     if (this.select_div) {
 
       if (this.current_y <  this.start_y) {
-        this.select_div.top = `${this.current_y + 7}px`;
+        this.select_div.style.top = `${this.current_y + 7}px`;
         top = this.current_y + 7;
       } else {
-        this.select_div.top = `${this.start_y}px`;
+        this.select_div.style.top = `${this.start_y}px`;
         top = this.start_y;
       }
       if (this.current_x <  this.start_x) {
-        this.select_div.left = `${this.current_x + 7}px`;
+        this.select_div.style.left = `${this.current_x + 7}px`;
         left = this.current_x + 7;
       } else {
-        this.select_div.left = `${this.start_x}px`;
+        this.select_div.style.left = `${this.start_x}px`;
         left = this.start_x;
       }
-      this.select_div.width = `${width}px`;
-      this.select_div.height = `${height}px`;
-      console.log(`select_div.width = ${width}`);
-      console.log(`select_div.height = ${height}`);
+      this.select_div.style.width = `${width}px`;
+      this.select_div.style.height = `${height}px`;
     }
   }
 
@@ -126,8 +124,10 @@ export default class UISelectModifier extends Modifier {
 
   @action
   onMouseUp() {
-    this.ui_select.remove_div();
-    this.ui_select = undefined;
+    if (this.ui_select) {
+      this.ui_select.remove_div();
+      this.ui_select = undefined;
+    }
   }
 
   @action
diff --git a/app/styles/node.scss b/app/styles/node.scss
index 912d8c5e2f8bab9fbe8212c8dc2f0d99c904817e..0a1dd21fffb1b070e04a70daeea5007c0509be5f 100644
--- a/app/styles/node.scss
+++ b/app/styles/node.scss
@@ -1,6 +1,8 @@
 .node {
   display: flex;
   align-items: center;
+  // make node title text unselectable
+  user-select: none;
 
   .icon {
     width: 4rem;
diff --git a/app/styles/ui_select.scss b/app/styles/ui_select.scss
index 3f95a139b53df49592d78e2c27acde4e1cf6212e..8452ae7714119294e095c45032652f831c058616 100644
--- a/app/styles/ui_select.scss
+++ b/app/styles/ui_select.scss
@@ -1,4 +1,4 @@
 #ui-select {
     background-color: #e6f5ff40;
-    border: 1px solid #e6f5ff;
+    border: 1px solid #A6DAFF;
 }
\ No newline at end of file