diff --git a/library/Director/Db/Branch/BranchMerger.php b/library/Director/Db/Branch/BranchMerger.php
index 8c8c76fe..5c99c42d 100644
--- a/library/Director/Db/Branch/BranchMerger.php
+++ b/library/Director/Db/Branch/BranchMerger.php
@@ -5,6 +5,7 @@ namespace Icinga\Module\Director\Db\Branch;
 use Icinga\Module\Director\Data\Db\DbObject;
 use Icinga\Module\Director\Data\Db\DbObjectTypeRegistry;
 use Icinga\Module\Director\Db;
+use Icinga\Module\Director\Objects\DirectorActivityLog;
 use Ramsey\Uuid\UuidInterface;
 
 class BranchMerger
@@ -82,9 +83,10 @@ class BranchMerger
     /**
      * @throws MergeError
      */
-    public function merge()
+    public function merge($comment)
     {
-        $this->connection->runFailSafeTransaction(function () {
+        $this->connection->runFailSafeTransaction(function () use ($comment) {
+            $formerActivityId = (int) DirectorActivityLog::loadLatest($this->connection)->get('id');
             $query = $this->db->select()
                 ->from(BranchActivity::DB_TABLE)
                 ->where('branch_uuid = ?', $this->connection->quoteBinary($this->branchUuid->getBytes()))
@@ -95,6 +97,15 @@ class BranchMerger
                 $this->applyModification($activity);
             }
             (new BranchStore($this->connection))->deleteByUuid($this->branchUuid);
+            $currentActivityId = (int) DirectorActivityLog::loadLatest($this->connection)->get('id');
+            $firstActivityId = (int) $this->db->fetchOne(
+                $this->db->select()->from('director_activity_log', 'MIN(id)')->where('id > ?', $formerActivityId)
+            );
+            $this->db->insert('director_activity_log_remark', [
+                'first_related_activity' => $firstActivityId,
+                'last_related_activity' => $currentActivityId,
+                'remark' => $comment,
+            ]);
         });
     }
 
diff --git a/library/Director/Web/Table/ActivityLogTable.php b/library/Director/Web/Table/ActivityLogTable.php
index d7bfc6fe..76a703ae 100644
--- a/library/Director/Web/Table/ActivityLogTable.php
+++ b/library/Director/Web/Table/ActivityLogTable.php
@@ -3,10 +3,11 @@
 namespace Icinga\Module\Director\Web\Table;
 
 use gipfl\Format\LocalTimeFormat;
-use Icinga\Module\Director\Util;
-use ipl\Html\BaseHtmlElement;
 use gipfl\IcingaWeb2\Link;
 use gipfl\IcingaWeb2\Table\ZfQueryBasedTable;
+use Icinga\Module\Director\Util;
+use ipl\Html\Html;
+use ipl\Html\HtmlElement;
 
 class ActivityLogTable extends ZfQueryBasedTable
 {
@@ -20,12 +21,6 @@ class ActivityLogTable extends ZfQueryBasedTable
 
     protected $hasObjectFilter = false;
 
-    /** @var BaseHtmlElement */
-    protected $currentHead;
-
-    /** @var BaseHtmlElement */
-    protected $currentBody;
-
     protected $searchColumns = [
         'author',
         'object_name',
@@ -35,6 +30,17 @@ class ActivityLogTable extends ZfQueryBasedTable
     /** @var LocalTimeFormat */
     protected $timeFormat;
 
+    protected $ranges = [];
+
+    /** @var ?object */
+    protected $currentRange = null;
+    /** @var ?HtmlElement */
+    protected $currentRangeCell = null;
+    /** @var int */
+    protected $rangeRows = 0;
+    protected $continueRange = false;
+    protected $currentRow;
+
     public function __construct($db)
     {
         parent::__construct($db);
@@ -52,8 +58,27 @@ class ActivityLogTable extends ZfQueryBasedTable
         return $this;
     }
 
+    protected function fetchQueryRows()
+    {
+        $rows = parent::fetchQueryRows();
+        // Hint -> DESC, that's why they are inverted
+        $last = $rows[0]->id;
+        $first = $rows[count($rows) - 1]->id;
+        $db = $this->db();
+        $this->ranges = $db->fetchAll(
+            $db->select()
+                ->from('director_activity_log_remark')
+                ->where('first_related_activity <= ?', $last)
+                ->where('last_related_activity >= ?', $first)
+        );
+
+        return $rows;
+    }
+
+
     public function renderRow($row)
     {
+        $this->currentRow = $row;
         $this->splitByDay($row->ts_change_time);
         $action = 'action-' . $row->action. ' ';
         if ($row->id > $this->lastDeployedId) {
@@ -62,10 +87,109 @@ class ActivityLogTable extends ZfQueryBasedTable
             $action .= 'deployed';
         }
 
-        return $this::tr([
+        $columns = [
             $this::td($this->makeLink($row))->setSeparator(' '),
-            $this::td($this->timeFormat->getTime($row->ts_change_time))
-        ])->addAttributes(['class' => $action]);
+        ];
+        if (! $this->hasObjectFilter) {
+            $columns[] = $this->makeRangeInfo($row->id);
+        }
+        $columns[] = $this::td($this->timeFormat->getTime($row->ts_change_time));
+
+        return $this::tr($columns)->addAttributes(['class' => $action]);
+    }
+
+    /**
+     * Hint: cloned from parent class and modified
+     * @param  int $timestamp
+     */
+    protected function renderDayIfNew($timestamp)
+    {
+        $day = $this->getDateFormatter()->getFullDay($timestamp);
+
+        if ($this->lastDay !== $day) {
+            $this->nextHeader()->add(
+                $this::th($day, [
+                    'colspan' => $this->hasObjectFilter ? 2 : 3,
+                    'class'   => 'table-header-day'
+                ])
+            );
+
+            $this->lastDay = $day;
+            if ($this->currentRangeCell) {
+                if ($this->currentRange->first_related_activity <= $this->currentRow->id) {
+                    $this->currentRangeCell->addAttributes(['class' => 'continuing']);
+                    $this->continueRange = true;
+                } else {
+                    $this->continueRange = false;
+                }
+            }
+            $this->currentRangeCell = null;
+            $this->currentRange = null;
+            $this->rangeRows = 0;
+            $this->nextBody();
+        }
+    }
+
+    protected function makeRangeInfo($id)
+    {
+        $range = $this->getRangeForId($id);
+        if ($range === null) {
+            if ($this->currentRangeCell) {
+                $this->currentRangeCell->getAttributes()->remove('class', 'continuing');
+            }
+            $this->currentRange = null;
+            $this->currentRangeCell = null;
+            $this->rangeRows = 0;
+            return $this::td();
+        }
+
+        if ($range === $this->currentRange) {
+            $this->growCurrentRange();
+            return null;
+        }
+        $this->startRange($range);
+
+        return $this->currentRangeCell;
+    }
+
+    protected function startRange($range)
+    {
+        $this->currentRangeCell = $this::td($this->renderRangeComment($range), [
+            'colspan' => $this->rangeRows = 1,
+            'class' => 'comment-cell'
+        ]);
+        if ($this->continueRange) {
+            $this->currentRangeCell->addAttributes(['class' => 'continued']);
+            $this->continueRange = false;
+        }
+        $this->currentRange = $range;
+    }
+
+    protected function renderRangeComment($range)
+    {
+        // The only purpose of this container is to avoid hovered rows from influencing
+        // the comments background color, as we're using the alpha channel to lighten it
+        // This can be replaced once we get theme-safe colors for such messages
+        return Html::tag('div', [
+            'class' => 'range-comment-container',
+        ], Link::create($this->continueRange ? '' : $range->remark, '#', null, ['class' => 'range-comment']));
+    }
+
+    protected function growCurrentRange()
+    {
+        $this->rangeRows++;
+        $this->currentRangeCell->setAttribute('rowspan', $this->rangeRows);
+    }
+
+    protected function getRangeForId($id)
+    {
+        foreach ($this->ranges as $range) {
+            if ($id >= $range->first_related_activity && $id <= $range->last_related_activity) {
+                return $range;
+            }
+        }
+
+        return null;
     }
 
     protected function makeLink($row)
diff --git a/public/css/module.less b/public/css/module.less
index 6836f9b3..1a3611b1 100644
--- a/public/css/module.less
+++ b/public/css/module.less
@@ -1297,6 +1297,9 @@ th.table-header-day {
 }
 
 table.activity-log {
+    td {
+      max-height: 2em;
+    }
     tr th:first-child {
         padding-left: 2em;
     }
@@ -1304,6 +1307,7 @@ table.activity-log {
     tr td:last-child {
         text-align: right;
         white-space: nowrap;
+        width:10%;
     }
 
     tr td:first-child {
@@ -1362,6 +1366,57 @@ table.activity-log {
     tr.undeployed td:first-child::before {
         color: @gray;
     }
+
+    div.range-comment-container {
+      width: 100%;
+      position: absolute;
+      height: 100%;
+      background: @body-bg-color;
+      border-radius: 0.5em;
+    }
+    a.range-comment {
+      width: 100%;
+      height: 100%;
+      display: block;
+      border-radius: 0.5em;
+      padding: 0.2em 1em;
+      vertical-align: middle;
+      &::-webkit-scrollbar {
+        display: none;
+      }
+      scrollbar-width: none;
+      -ms-overflow-style: none;
+      overflow-y:auto;
+      overflow-x:hidden;
+      &:hover {
+        text-decoration: none;
+      }
+      background: fade(@color-warning-handled, 40%);
+      &:hover {
+        background: fade(@color-warning-handled, 60%);
+      }
+    }
+    td.comment-cell {
+      padding: 0;
+      min-width: 10em;
+      position: relative;
+      &.continuing div.range-comment-container {
+        border-bottom-left-radius: 0;
+        border-bottom-right-radius: 0;
+        a.range-comment {
+          border-bottom-left-radius: 0;
+          border-bottom-right-radius: 0;
+        }
+      }
+      &.continued div.range-comment-container {
+        border-top-left-radius: 0;
+        border-top-right-radius: 0;
+        a.range-comment {
+          border-top-left-radius: 0;
+          border-top-right-radius: 0;
+        }
+      }
+    }
 }
 
 tr.branch_modified {
@@ -1800,4 +1855,4 @@ table.table-basket-changes {
     text-align: left;
     min-width: 10em;
   }
-}
\ No newline at end of file
+}
diff --git a/schema/mysql-migrations/upgrade_178.sql b/schema/mysql-migrations/upgrade_178.sql
new file mode 100644
index 00000000..589e6043
--- /dev/null
+++ b/schema/mysql-migrations/upgrade_178.sql
@@ -0,0 +1,20 @@
+CREATE TABLE director_activity_log_remark (
+  first_related_activity BIGINT(20) UNSIGNED NOT NULL,
+  last_related_activity BIGINT(20) UNSIGNED NOT NULL,
+  remark TEXT NOT NULL,
+  PRIMARY KEY (first_related_activity, last_related_activity),
+  CONSTRAINT activity_log_remark_begin
+    FOREIGN KEY first_related_activity (first_related_activity)
+      REFERENCES director_activity_log (id)
+      ON DELETE CASCADE
+      ON UPDATE CASCADE,
+  CONSTRAINT activity_log_remark_end
+    FOREIGN KEY last_related_activity (last_related_activity)
+      REFERENCES director_activity_log (id)
+      ON DELETE CASCADE
+      ON UPDATE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+
+INSERT INTO director_schema_migration
+  (schema_version, migration_time)
+  VALUES ('178', NOW());
diff --git a/schema/mysql.sql b/schema/mysql.sql
index 12c4a6b3..142b91ca 100644
--- a/schema/mysql.sql
+++ b/schema/mysql.sql
@@ -49,6 +49,23 @@ CREATE TABLE director_activity_log (
   INDEX checksum (checksum)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
+CREATE TABLE director_activity_log_remark (
+  first_related_activity BIGINT(20) UNSIGNED NOT NULL,
+  last_related_activity BIGINT(20) UNSIGNED NOT NULL,
+  remark TEXT NOT NULL,
+  PRIMARY KEY (first_related_activity, last_related_activity),
+  CONSTRAINT activity_log_remark_begin
+    FOREIGN KEY first_related_activity (first_related_activity)
+      REFERENCES director_activity_log (id)
+      ON DELETE CASCADE
+      ON UPDATE CASCADE,
+  CONSTRAINT activity_log_remark_end
+    FOREIGN KEY last_related_activity (last_related_activity)
+      REFERENCES director_activity_log (id)
+      ON DELETE CASCADE
+      ON UPDATE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+
 CREATE TABLE director_basket (
   uuid VARBINARY(16) NOT NULL,
   basket_name VARCHAR(64) NOT NULL,
@@ -2397,4 +2414,4 @@ CREATE TABLE branched_icinga_dependency (
 
 INSERT INTO director_schema_migration
   (schema_version, migration_time)
-  VALUES (176, NOW());
+  VALUES (178, NOW());
diff --git a/schema/pgsql-migrations/upgrade_178.sql b/schema/pgsql-migrations/upgrade_178.sql
new file mode 100644
index 00000000..8419384a
--- /dev/null
+++ b/schema/pgsql-migrations/upgrade_178.sql
@@ -0,0 +1,23 @@
+CREATE TABLE director_activity_log_remark (
+  first_related_activity bigint NOT NULL,
+  last_related_activity bigint NOT NULL,
+  remark TEXT NOT NULL,
+  PRIMARY KEY (first_related_activity, last_related_activity),
+  CONSTRAINT activity_log_remark_begin
+    FOREIGN KEY (first_related_activity)
+      REFERENCES director_activity_log (id)
+      ON DELETE CASCADE
+      ON UPDATE CASCADE,
+  CONSTRAINT activity_log_remark_end
+    FOREIGN KEY (last_related_activity)
+      REFERENCES director_activity_log (id)
+      ON DELETE CASCADE
+      ON UPDATE CASCADE
+);
+
+CREATE INDEX first_related_activity ON director_activity_log_remark (first_related_activity);
+CREATE INDEX last_related_activity ON director_activity_log_remark (last_related_activity);
+
+INSERT INTO director_schema_migration
+  (schema_version, migration_time)
+  VALUES (178, NOW());
diff --git a/schema/pgsql.sql b/schema/pgsql.sql
index b73d84da..711390f9 100644
--- a/schema/pgsql.sql
+++ b/schema/pgsql.sql
@@ -97,6 +97,26 @@ CREATE INDEX activity_log_author ON director_activity_log (author);
 COMMENT ON COLUMN director_activity_log.old_properties IS 'Property hash, JSON';
 COMMENT ON COLUMN director_activity_log.new_properties IS 'Property hash, JSON';
 
+CREATE TABLE director_activity_log_remark (
+  first_related_activity bigint NOT NULL,
+  last_related_activity bigint NOT NULL,
+  remark TEXT NOT NULL,
+  PRIMARY KEY (first_related_activity, last_related_activity),
+  CONSTRAINT activity_log_remark_begin
+    FOREIGN KEY (first_related_activity)
+      REFERENCES director_activity_log (id)
+      ON DELETE CASCADE
+      ON UPDATE CASCADE,
+  CONSTRAINT activity_log_remark_end
+    FOREIGN KEY (last_related_activity)
+      REFERENCES director_activity_log (id)
+      ON DELETE CASCADE
+      ON UPDATE CASCADE
+);
+
+CREATE INDEX first_related_activity ON director_activity_log_remark (first_related_activity);
+CREATE INDEX last_related_activity ON director_activity_log_remark (last_related_activity);
+
 
 CREATE TABLE director_basket (
   uuid bytea CHECK(LENGTH(uuid) = 16) NOT NULL,
@@ -2743,4 +2763,4 @@ CREATE INDEX branched_dependency_search_object_name ON branched_icinga_dependenc
 
 INSERT INTO director_schema_migration
   (schema_version, migration_time)
-  VALUES (176, NOW());
+  VALUES (178, NOW());