grafana/public/app/plugins/panel/heatmap/partials/axes_editor.html

<div class="editor-row">
  <div class="section gf-form-group">
    <h5 class="section-heading">Y Axis</h5>
    <div class="gf-form">
      <label class="gf-form-label width-6">Unit</label>
      <div class="gf-form-dropdown-typeahead max-width-10"
           ng-model="ctrl.panel.yAxis.format"
           dropdown-typeahead2="editor.unitFormats"
           dropdown-typeahead-on-select="editor.setUnitFormat($subItem)">
      </div>
    </div>
    <div class="gf-form">
      <label class="gf-form-label width-6">Scale</label>
      <div class="gf-form-select-wrapper max-width-10">
        <select class="gf-form-input" ng-model="ctrl.panel.yAxis.logBase" ng-options="v as k for (k, v) in editor.logScales" ng-change="ctrl.refresh()"></select>
      </div>
    </div>
    <div class="gf-form">
      <label class="gf-form-label width-6">Y-Min</label>
      <input type="text" class="gf-form-input width-10" placeholder="auto" empty-to-null ng-model="ctrl.panel.yAxis.min" ng-change="ctrl.render()" ng-model-onblur>
    </div>
    <div class="gf-form">
      <label class="gf-form-label width-6">Y-Max</label>
      <input type="text" class="gf-form-input width-10" placeholder="auto" empty-to-null ng-model="ctrl.panel.yAxis.max" ng-change="ctrl.render()" ng-model-onblur>
    </div>
    <div class="gf-form">
      <label class="gf-form-label width-6">Decimals</label>
      <input type="number" class="gf-form-input width-10" placeholder="auto" data-placement="right"
                                                                             bs-tooltip="'Override automatic decimal precision for axis.'"
                                                                             ng-model="ctrl.panel.yAxis.decimals" ng-change="ctrl.render()" ng-model-onblur>
    </div>
  </div>

  <div class="section gf-form-group" ng-if="ctrl.panel.dataFormat == 'timeseries'">
    <h5 class="section-heading">Buckets</h5>
    <div ng-show="ctrl.panel.yAxis.logBase === 1">
      <div class="gf-form-inline">
        <div class="gf-form">
          <label class="gf-form-label">Y Axis</label>
          <label class="gf-form-label">Buckets</label>
          <input type="number" class="gf-form-input width-5" placeholder="auto" data-placement="right"
                                                                                bs-tooltip="'Number of buckets for Y axis.'"
                                                                                ng-model="ctrl.panel.yBucketNumber" ng-change="ctrl.refresh()" ng-model-onblur>
        </div>
        <div class="gf-form">
          <label class="gf-form-label">Size</label>
          <input type="number" class="gf-form-input width-5" placeholder="auto" data-placement="right"
                                                                                bs-tooltip="'Size of bucket. Has priority over Buckets option.'"
                                                                                ng-model="ctrl.panel.yBucketSize" ng-change="ctrl.refresh()" ng-model-onblur>
        </div>
      </div>
      <div class="gf-form-inline">
        <div class="gf-form">
          <label class="gf-form-label">X Axis</label>
          <label class="gf-form-label">Buckets</label>
          <input type="number" class="gf-form-input width-5" placeholder="auto" data-placement="right"
                                                                                bs-tooltip="'Number of buckets for Y axis.'"
                                                                                ng-model="ctrl.panel.yBucketNumber" ng-change="ctrl.refresh()" ng-model-onblur>
        </div>
        <div class="gf-form">
          <label class="gf-form-label">Size</label>
          <input type="text" class="gf-form-input width-5" placeholder="auto" data-placement="right"
                                                                              bs-tooltip="'Size of bucket. Number or interval (10s, 5m, 1h, etc). Supported intervals: ms, s, m, h, d, w, M, y. Has priority over Buckets option.'"
                                                                              ng-model="ctrl.panel.xBucketSize" ng-change="ctrl.refresh()" ng-model-onblur>
        </div>
      </div>
    </div>
    <div ng-show="ctrl.panel.yAxis.logBase !== 1">
      <div class="gf-form">
        <label class="gf-form-label width-7">Split Factor</label>
        <input type="number"
               class="gf-form-input width-3"
               placeholder="1"
               data-placement="right"
               bs-tooltip="'For log scales only. By default Y values is splitted by integer powers of log base (1, 2, 4, 8, 16, ... for log2). This option allows to split each default bucket into specified number of buckets.'"
               ng-model="ctrl.panel.yAxis.splitFactor" ng-change="ctrl.refresh()" ng-model-onblur>
        </input>
      </div>
    </div>
  </div>

  <div class="section gf-form-group">
    <h5 class="section-heading">Data format</h5>
    <div class="gf-form">
      <label class="gf-form-label width-5">Format</label>
      <div class="gf-form-select-wrapper max-width-15">
        <select class="gf-form-input" ng-model="ctrl.panel.dataFormat" ng-options="v as k for (k, v) in editor.dataFormats" ng-change="ctrl.render()"></select>
      </div>
    </div>
  </div>
</div>