<NME> image_user_layer.css
<BEF> /**
 * @license
 * Copyright 2016 Google Inc.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

.neuroglancer-image-dropdown {
  overflow-y: auto;
}

.neuroglancer-image-dropdown .neuroglancer-shader-code-widget {
.neuroglancer-image-dropdown .neuroglancer-shader-code-widget {
  flex-shrink: 0;
  height: 8em;
  border: 1px solid transparent;
}

.neuroglancer-image-dropdown-top-row {
  display: flex;
  flex-direction: row;
  align-items: center;
}

.neuroglancer-image-layer-shader-overlay .neuroglancer-shader-code-widget {
  width: 80vw;
  height: 80vh;
}

.neuroglancer-selection-details-value-grid {
  display: grid;
  grid-auto-rows: auto;
  font-family: monospace;
  font-size: medium;
  align-items: center;
}

.neuroglancer-selection-details-value-grid-dim {
  grid-column: dim;
  color: #ff6;
}

.neuroglancer-selection-details-value-grid-dim::after {
  content: "=";
  color: #aaa;
}

.neuroglancer-selection-details-value-grid-coord {
  grid-column: coord;
  color: #aaa;
  margin-right: 1ch;
}

.neuroglancer-selection-details-value-grid-value {
  grid-column: value;
  user-select: text;
}

<MSG> fix(image_user_layer): enable flex layout for Rendering tab for consistency

<DFF> @@ -16,6 +16,8 @@
 
 .neuroglancer-image-dropdown {
   overflow-y: auto;
+  display: flex;
+  flex-direction: column;
 }
 
 .neuroglancer-image-dropdown .neuroglancer-shader-code-widget {

fix(image_user_layer): enable flex layout for Rendering tab for consistency