diff --git a/src/app/component/context-menu/context-menu.component.css b/src/app/component/context-menu/context-menu.component.css
index 726a6327..a51cfca7 100644
--- a/src/app/component/context-menu/context-menu.component.css
+++ b/src/app/component/context-menu/context-menu.component.css
@@ -91,11 +91,11 @@ ul > li.hasHighlight:hover {
   background-color: rgba(30, 30, 30, 0.8);
 }
 ul > li.has-color.hasHighlight:hover {
-  text-shadow: 
+  text-shadow:
     1px  0px 1px #ffffff,
     0px  1px 1px #ffffff,
     -1px  0px 1px #ffffff,
-    0px -1px 1px #ffffff; 
+    0px -1px 1px #ffffff;
 }
 
 .menu-title:not(.icon-menu) {
@@ -109,10 +109,8 @@ td.altitude {
 }
 
 input.altitude {
-  writing-mode: bt-lr;   
-  appearance: slider-vertical;
+  writing-mode: vertical-lr;
   width: 8px;
-  height: 100%;
   padding: 3px;
 }
 
@@ -177,7 +175,7 @@ input.altitude {
 
 .color-indicator {
   font-size: larger;
-  text-shadow: 
+  text-shadow:
   1px  1px 0px #ffffff,
   -1px  1px 0px #ffffff,
    1px -1px 0px #ffffff,
@@ -196,4 +194,4 @@ input.altitude {
 .hotkey {
   float: right;
   font-size: smaller;
-}
\ No newline at end of file
+}