diff --git a/src/components/Assignments/Assignment/AssignmentsTable/AssignmentsTable.js b/src/components/Assignments/Assignment/AssignmentsTable/AssignmentsTable.js
index b3ede40b4..495d16f8d 100644
--- a/src/components/Assignments/Assignment/AssignmentsTable/AssignmentsTable.js
+++ b/src/components/Assignments/Assignment/AssignmentsTable/AssignmentsTable.js
@@ -436,7 +436,7 @@ class AssignmentsTable extends Component {
                   defaultMessage="(supervisors and students of this group)"
                 />
               }
-              inModal
+              displayAs="modal"
             />
           )}
         </Modal>
diff --git a/src/components/widgets/Comments/CommentBox/CommentBox.js b/src/components/widgets/Comments/CommentBox/CommentBox.js
index df48bf112..59ec18527 100644
--- a/src/components/widgets/Comments/CommentBox/CommentBox.js
+++ b/src/components/widgets/Comments/CommentBox/CommentBox.js
@@ -5,10 +5,11 @@ import { Modal } from 'react-bootstrap';
 import classnames from 'classnames';
 
 import Box from '../../Box';
+import Icon, { ChatIcon } from '../../../icons';
 import styles from '../comments.less';
 
 class CommentBox extends Component {
-  state = { prevCount: 0 };
+  state = { prevCount: 0, panelOpen: false };
 
   componentDidMount() {
     setTimeout(() => this.scrollToBottom(), 10);
@@ -29,10 +30,17 @@ class CommentBox extends Component {
     }
   };
 
+  openPanel = () => this.setState({ panelOpen: true });
+  closePanel = () => this.setState({ panelOpen: false });
+
   renderMessages() {
     return (
       <div
-        className={classnames({ 'direct-chat-messages': true, [styles.fullHeight]: this.props.inModal })}
+        className={classnames({
+          'direct-chat-messages': true,
+          [styles.body]: this.props.displayAs === 'panel',
+          [styles.modalHeight]: this.props.displayAs === 'modal',
+        })}
         ref={c => {
           this.commentsContainer = c;
         }}>
@@ -45,10 +53,10 @@ class CommentBox extends Component {
     const {
       title = <FormattedMessage id="app.comments.title" defaultMessage="Comments and Notes" />,
       footer,
-      inModal = false,
+      displayAs = 'box',
     } = this.props;
 
-    return inModal ? (
+    return displayAs === 'modal' ? (
       <>
         <Modal.Header closeButton>
           <Modal.Title>{title}</Modal.Title>
@@ -58,6 +66,27 @@ class CommentBox extends Component {
           <div className="full-width">{footer}</div>
         </Modal.Footer>
       </>
+    ) : displayAs === 'panel' ? (
+      <>
+        <div className={classnames({ [styles.panel]: true, [styles.panelOpen]: this.state.panelOpen })}>
+          <div>
+            <span className={styles.panelIcon}>
+              {this.state.panelOpen ? (
+                <Icon icon="angles-right" className="text-muted" onClick={this.closePanel} />
+              ) : (
+                <ChatIcon className="text-primary" onClick={this.openPanel} />
+              )}
+            </span>
+            {this.state.panelOpen && (
+              <>
+                <div className={styles.header}>{title}</div>
+                {this.renderMessages()}
+                <div className={styles.footer}>{footer}</div>
+              </>
+            )}
+          </div>
+        </div>
+      </>
     ) : (
       <Box title={title} noPadding={false} collapsable footer={footer} className="direct-chat">
         {this.renderMessages()}
@@ -70,7 +99,7 @@ CommentBox.propTypes = {
   title: PropTypes.oneOfType([PropTypes.element, PropTypes.string]),
   commentsCount: PropTypes.number.isRequired,
   footer: PropTypes.element,
-  inModal: PropTypes.bool,
+  displayAs: PropTypes.string,
   children: PropTypes.element,
 };
 
diff --git a/src/components/widgets/Comments/CommentThread/CommentThread.js b/src/components/widgets/Comments/CommentThread/CommentThread.js
index 87c70fe7f..1499b499d 100644
--- a/src/components/widgets/Comments/CommentThread/CommentThread.js
+++ b/src/components/widgets/Comments/CommentThread/CommentThread.js
@@ -17,7 +17,7 @@ const CommentThread = ({
   setPrivacy,
   refresh,
   deleteComment,
-  inModal = false,
+  displayAs = 'box',
 }) => (
   <CommentBox
     title={title}
@@ -25,7 +25,7 @@ const CommentThread = ({
     footer={
       addComment && <AddComment addComment={addComment} additionalPublicSwitchNote={additionalPublicSwitchNote} />
     }
-    inModal={inModal}>
+    displayAs={displayAs}>
     <div>
       {comments.map((comment, i) =>
         comment.user.id === currentUserId ? (
@@ -76,7 +76,7 @@ CommentThread.propTypes = {
   setPrivacy: PropTypes.func,
   refresh: PropTypes.func,
   deleteComment: PropTypes.func,
-  inModal: PropTypes.bool,
+  displayAs: PropTypes.string,
 };
 
 export default CommentThread;
diff --git a/src/components/widgets/Comments/comments.less b/src/components/widgets/Comments/comments.less
index b170f0182..7cb607c6d 100644
--- a/src/components/widgets/Comments/comments.less
+++ b/src/components/widgets/Comments/comments.less
@@ -1,4 +1,4 @@
-.fullHeight {
+.modalHeight {
   height: calc(90vh - 200px) !important;
 }
 
@@ -17,3 +17,102 @@
 .iconButtonDelete {
   color: #f88;
 }
+
+.panel {
+  position: fixed;
+  top: 66px;
+  bottom: 10px;
+  right: 0;
+  width: 0.25rem;
+  border-bottom-left-radius: 0.25rem;
+  box-shadow: rgba(0, 0, 0, 0.16) 0px 3px 6px, rgba(0, 0, 0, 0.23) 0px 3px 6px;
+  transition: width ease 0.2s;
+  z-index: 2;
+}
+
+.panel > div {
+  position: absolute;
+  top: 0;
+  left: 0;
+  bottom: 0;
+  right: 0;
+  background-color: white;
+  border: 1px solid rgba(0, 0, 0, 0.125);
+  border-right: 0;
+  border-bottom-left-radius: 0.25rem;
+  display: flex;
+  flex-direction: column;
+}
+
+.panelOpen {
+  width: 42vw;
+  min-width: 400px;
+  border-top-left-radius: 0.25rem;
+}
+
+.panelOpen > div {
+  border-top-left-radius: 0.25rem;
+}
+
+.panel span.panelIcon {
+  position: absolute;
+  top: -1px;
+  left: -3rem;
+  width: 3rem;
+  height: 3rem;
+  font-size: 1.3rem;
+  text-align: center;
+  line-height: 3rem;
+
+  background-color: white;
+  border: 1px solid rgba(0, 0, 0, 0.125);
+  border-right: 0;
+  border-top-left-radius: 1rem;
+  border-bottom-left-radius: 1rem;
+  z-index: 3;
+
+  transition: top ease 1s;
+}
+
+.panel::after {
+  position: absolute;
+  content: ""; 
+  top: 0;
+  left: calc(1px - 3rem);
+  width: 3rem;
+  height: 3rem;
+  background-color: white;
+  display: block;
+  border-top-left-radius: 1rem;
+  border-bottom-left-radius: 1rem;
+  box-shadow: rgba(0, 0, 0, 0.16) 0px 3px 6px, rgba(0, 0, 0, 0.23) 0px 3px 6px;
+  z-index: -1;
+  transition: top ease 1s;
+}
+
+.panelOpen span.panelIcon {
+  top: calc(50% - 1.5rem);
+}
+
+.panelOpen::after {
+  top: calc(50% - 1.5rem);
+}
+
+.panel span.panelIcon > * {
+  cursor: pointer;
+}
+
+.panel div.header {
+  font-size: 1.1rem;
+  padding: 0.75rem 1.25rem;
+  border-bottom: 1px solid rgba(0, 0, 0, 0.125);
+}
+
+.panel div.body {
+  flex-grow: 1;
+}
+
+.panel div.footer {
+  border-top: 1px solid rgba(0, 0, 0, 0.125);
+  padding: 0.75rem 1.25rem;
+}
\ No newline at end of file
diff --git a/src/containers/CommentThreadContainer/CommentThreadContainer.js b/src/containers/CommentThreadContainer/CommentThreadContainer.js
index dc6bc49b1..72456c257 100644
--- a/src/containers/CommentThreadContainer/CommentThreadContainer.js
+++ b/src/containers/CommentThreadContainer/CommentThreadContainer.js
@@ -46,7 +46,7 @@ class CommentThreadContainer extends Component {
       setPrivacy,
       refresh,
       deleteComment,
-      inModal = false,
+      displayAs = 'box',
     } = this.props;
 
     return (
@@ -62,7 +62,7 @@ class CommentThreadContainer extends Component {
             repostComment={repostComment}
             refresh={refresh}
             deleteComment={deleteComment}
-            inModal={inModal}
+            displayAs={displayAs}
           />
         )}
       </ResourceRenderer>
@@ -74,7 +74,7 @@ CommentThreadContainer.propTypes = {
   threadId: PropTypes.string.isRequired,
   title: PropTypes.oneOfType([PropTypes.element, PropTypes.string]),
   additionalPublicSwitchNote: PropTypes.oneOfType([PropTypes.string, PropTypes.element]),
-  inModal: PropTypes.bool,
+  displayAs: PropTypes.string,
   thread: PropTypes.object,
   user: PropTypes.object,
   addComment: PropTypes.func.isRequired,
diff --git a/src/pages/AssignmentSolutions/AssignmentSolutions.js b/src/pages/AssignmentSolutions/AssignmentSolutions.js
index 5a7f40333..a7899a924 100644
--- a/src/pages/AssignmentSolutions/AssignmentSolutions.js
+++ b/src/pages/AssignmentSolutions/AssignmentSolutions.js
@@ -530,7 +530,7 @@ class AssignmentSolutions extends Component {
                         defaultMessage="(supervisors and students of this group)"
                       />
                     }
-                    inModal
+                    displayAs="modal"
                   />
                 </Modal>
               </Col>
diff --git a/src/pages/SolutionSourceCodes/SolutionSourceCodes.js b/src/pages/SolutionSourceCodes/SolutionSourceCodes.js
index cb67656eb..ae7ff40f9 100644
--- a/src/pages/SolutionSourceCodes/SolutionSourceCodes.js
+++ b/src/pages/SolutionSourceCodes/SolutionSourceCodes.js
@@ -22,12 +22,13 @@ import {
   StopIcon,
   SwapIcon,
 } from '../../components/icons';
-import SolutionActionsContainer from '../../containers/SolutionActionsContainer';
 import SourceCodeBox from '../../components/Solutions/SourceCodeBox';
 import ReviewSummary from '../../components/Solutions/ReviewSummary';
 import RecentlyVisited from '../../components/Solutions/RecentlyVisited';
 import { registerSolutionVisit } from '../../components/Solutions/RecentlyVisited/functions';
 import Callout from '../../components/widgets/Callout';
+import SolutionActionsContainer from '../../containers/SolutionActionsContainer';
+import CommentThreadContainer from '../../containers/CommentThreadContainer';
 
 import { fetchRuntimeEnvironments } from '../../redux/modules/runtimeEnvironments';
 import { fetchAssignmentIfNeeded } from '../../redux/modules/assignments';
@@ -67,7 +68,13 @@ const wrapInArray = defaultMemoize(entry => [entry]);
 const localStorageDiffMappingsKey = 'SolutionSourceCodes.diffMappings.';
 
 class SolutionSourceCodes extends Component {
-  state = { diffDialogOpen: false, mappingDialogOpenFile: null, mappingDialogDiffWith: null, diffMappings: {} };
+  state = {
+    diffDialogOpen: false,
+    mappingDialogOpenFile: null,
+    mappingDialogDiffWith: null,
+    diffMappings: {},
+    commentsOpen: false,
+  };
 
   static loadAsync = ({ solutionId, assignmentId, secondSolutionId }, dispatch) =>
     Promise.all([
@@ -147,6 +154,9 @@ class SolutionSourceCodes extends Component {
     this.setState({ diffDialogOpen: false, mappingDialogOpenFile: null, mappingDialogDiffWith: null });
   };
 
+  openComments = () => this.setState({ commentsOpen: true });
+  closeComments = () => this.setState({ commentsOpen: false });
+
   selectDiffSolution = id => {
     const {
       match: {
@@ -593,6 +603,17 @@ class SolutionSourceCodes extends Component {
               )}
             </ResourceRenderer>
 
+            <CommentThreadContainer
+              threadId={solution.id}
+              additionalPublicSwitchNote={
+                <FormattedMessage
+                  id="app.solutionDetail.comments.additionalSwitchNote"
+                  defaultMessage="(author of the solution and supervisors of this group)"
+                />
+              }
+              displayAs="panel"
+            />
+
             <Modal show={this.state.diffDialogOpen} backdrop="static" onHide={this.closeDialogs} size="xl">
               <Modal.Header closeButton>
                 <Modal.Title>