diff --git a/cvat-ui/src/components/annotation-page/annotations-filters-input.tsx b/cvat-ui/src/components/annotation-page/annotations-filters-input.tsx
index 92276391..0d701df3 100644
--- a/cvat-ui/src/components/annotation-page/annotations-filters-input.tsx
+++ b/cvat-ui/src/components/annotation-page/annotations-filters-input.tsx
@@ -146,6 +146,7 @@ function AnnotationsFiltersInput(props: StateToProps & DispatchToProps): JSX.Ele
                                         width: 700,
                                         title: 'How to use filters?',
                                         content: filtersHelpModalContent(searchForwardShortcut, searchBackwardShortcut),
+                                        className: 'cvat-annotations-filters-help-modal-window',
                                     });
                                 }}
                                 onMouseEnter={() => setDropdownVisible(false)}
diff --git a/tests/cypress/integration/actions_tasks_objects/issue_2690_filters_help_window.js b/tests/cypress/integration/actions_tasks_objects/issue_2690_filters_help_window.js
new file mode 100644
index 00000000..3cd00cad
--- /dev/null
+++ b/tests/cypress/integration/actions_tasks_objects/issue_2690_filters_help_window.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2021 Intel Corporation
+//
+// SPDX-License-Identifier: MIT
+
+/// <reference types="cypress" />
+
+import { taskName } from '../../support/const';
+
+context('Annotation filter help dialog window.', () => {
+    const issueId = '2690';
+
+    before(() => {
+        cy.openTaskJob(taskName);
+    });
+
+    describe(`Testing issue "${issueId}"`, () => {
+        it('Open annotation filters help dialog window. The window is visible.', () => {
+            cy.get('.cvat-annotations-filters-input').within(() => {
+                // class="ant-select-selection-placeholder" has CSS pointer-events: none
+                cy.get('.ant-select-selection-placeholder').invoke('css', 'pointer-events', 'auto'); // Replace CSS "pointer-events" to auto
+                cy.get('[aria-label="filter"]').click();
+            });
+            cy.get('.cvat-annotations-filters-help-modal-window').should('exist').and('be.visible');
+        });
+
+        it('Close annotation filters help dialog window. The window is closed.', () => {
+            cy.get('.cvat-annotations-filters-help-modal-window').within(() => {
+                cy.contains('button', 'OK').click();
+            });
+            cy.get('.cvat-annotations-filters-help-modal-window').should('not.exist');
+        });
+    });
+});