diff --git a/src/components/event/EventWindowHeader.tsx b/src/components/event/EventWindowHeader.tsx
index 9ae70a70..1d26b22a 100644
--- a/src/components/event/EventWindowHeader.tsx
+++ b/src/components/event/EventWindowHeader.tsx
@@ -24,9 +24,9 @@ import { EventListArrowNav } from './EventListNavigation';
 import useEventsDataStore from '../../hooks/useEventsDataStore';
 import { isEventsStore } from '../../helpers/stores';
 import { EventsIntervalInput } from './EventsIntervalInput';
-import Select from '../util/Select';
 import { useBooksStore } from '../../hooks/useBooksStore';
 import { SearchDirection } from '../../models/search/SearchDirection';
+import MultiSelect from '../util/MultiSelect';
 
 function EventWindowHeader() {
 	const eventStore = useWorkspaceEventStore();
@@ -58,15 +58,15 @@ function EventWindowHeader() {
 					</div>
 					<EventsIntervalInput />
 				</div>
-				<Select
+				<MultiSelect
 					className='event-window-header__scope'
 					options={booksStore.scopeList}
 					onChange={scope => {
 						if (scope) {
-							eventStore.applyScope(scope);
+							eventStore.applyScope(scope[0]);
 						}
 					}}
-					selected={eventStore.scope || ''}
+					selected={eventStore.scope ? [eventStore.scope] : []}
 				/>
 				{eventDataStore.isLoading && (
 					<div className='event-window-header__loader'>
diff --git a/src/components/util/MultiSelect.tsx b/src/components/util/MultiSelect.tsx
new file mode 100644
index 00000000..7c527ee2
--- /dev/null
+++ b/src/components/util/MultiSelect.tsx
@@ -0,0 +1,169 @@
+/** ****************************************************************************
+ * Copyright 2020-2020 Exactpro (Exactpro Systems Limited)
+ *
+ * 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.
+ ***************************************************************************** */
+
+import React, { useState, useRef, useEffect } from 'react';
+import '../../styles/multiselect.scss';
+import { ModalPortal } from './Portal';
+import { raf } from '../../helpers/raf';
+import { useOutsideClickListener } from '../../hooks';
+
+interface Props<T> {
+	className?: string;
+	options: Array<T>;
+	onChange: (selected: Array<T>) => void;
+	selected?: Array<T>;
+}
+
+function MultiSelect<T>({ options, onChange, selected = [], className = '' }: Props<T>) {
+	const [selectedValues, setSelectedValues] = useState<T[]>(selected || []);
+	const [isOpen, setIsOpen] = useState(false);
+	const [isAllSelected, setIsAllSelected] = useState(false);
+	const [partialSelect, setPartialSelect] = useState(0);
+	const dropdownRef = useRef<HTMLDivElement>(null);
+	const multiselectBodyRef = useRef<HTMLDivElement>(null);
+	const indeterminateCheckboxRef = useRef<HTMLInputElement>(null);
+
+	useEffect(() => {
+		if (selectedValues.length === 0) {
+			setIsAllSelected(false);
+			setPartialSelect(0);
+		} else if (selectedValues.length === options.length) {
+			setIsAllSelected(true);
+			setPartialSelect(2);
+		} else {
+			setIsAllSelected(false);
+			setPartialSelect(1);
+		}
+	}, [selectedValues, options.length]);
+
+	useEffect(() => {
+		if (indeterminateCheckboxRef.current) {
+			indeterminateCheckboxRef.current.indeterminate = partialSelect === 1;
+		}
+	}, [partialSelect]);
+
+	const handleSelectAll = () => {
+		if (!isAllSelected) {
+			setSelectedValues([...options]);
+		} else {
+			setSelectedValues([]);
+		}
+	};
+
+	const handlePartialSelect = () => {
+		if (partialSelect === 0 || partialSelect === 1) {
+			setSelectedValues([...options]);
+		} else {
+			setSelectedValues([]);
+		}
+	};
+
+	const handleSelect = (value: T) => {
+		const newSelectedValues = selectedValues.includes(value)
+			? selectedValues.filter(v => v !== value)
+			: [...selectedValues, value];
+
+		setSelectedValues(newSelectedValues);
+		if (onChange) {
+			onChange(newSelectedValues);
+		}
+	};
+
+	const toggleDropdown = () => setIsOpen(!isOpen);
+
+	React.useLayoutEffect(() => {
+		if (isOpen) {
+			raf(() => {
+				if (multiselectBodyRef.current && dropdownRef.current) {
+					const { left, bottom } = dropdownRef.current.getBoundingClientRect();
+					const clientWidth = document.documentElement.clientWidth;
+
+					let calculatedWidth = multiselectBodyRef.current.clientWidth;
+					const leftPosition = left;
+
+					if (left + calculatedWidth > clientWidth) {
+						calculatedWidth = clientWidth - left - 10;
+					}
+
+					multiselectBodyRef.current.style.left = `${leftPosition}px`;
+					multiselectBodyRef.current.style.top = `${bottom}px`;
+					multiselectBodyRef.current.style.width = `${calculatedWidth}px`;
+				}
+			}, 2);
+		}
+	}, [isOpen]);
+
+	useOutsideClickListener(
+		multiselectBodyRef,
+		(e: MouseEvent) => {
+			if (
+				e.target instanceof Element &&
+				!multiselectBodyRef.current?.contains(e.target) &&
+				!dropdownRef.current?.contains(e.target)
+			) {
+				setIsOpen(false);
+			}
+		},
+		isOpen,
+	);
+
+	return (
+		<div className={`multiselect ${className}`}>
+			<div ref={dropdownRef} className='dropdown-header' onClick={toggleDropdown}>
+				<div className='dropdown-header__text'>
+					{selectedValues.length > 0 ? selectedValues.join(', ') : ''}
+				</div>
+			</div>
+			<ModalPortal isOpen={isOpen}>
+				<div ref={multiselectBodyRef} className='dropdown-menu'>
+					<ul className='dropdown-list'>
+						<li className='dropdown-item' onClick={handlePartialSelect}>
+							<input
+								type='checkbox'
+								className='indeterminate-checkbox'
+								checked={partialSelect === 2}
+								ref={indeterminateCheckboxRef}
+								readOnly
+							/>
+							{partialSelect === 0 ? '0 Selected' : `${selectedValues.length} Selected`}
+						</li>
+
+						<li className='dropdown-item' onClick={handleSelectAll}>
+							<input type='checkbox' checked={isAllSelected} readOnly />
+							Select All
+						</li>
+
+						{options.map(option => (
+							<li
+								key={String(option)}
+								className={`dropdown-item ${selectedValues.includes(option) ? 'selected' : ''}`}
+								onClick={() => handleSelect(option)}>
+								<input
+									type='checkbox'
+									checked={selectedValues.includes(option)}
+									onChange={() => handleSelect(option)}
+								/>
+								{option}
+							</li>
+						))}
+					</ul>
+				</div>
+			</ModalPortal>
+		</div>
+	);
+}
+
+export default MultiSelect;
diff --git a/src/styles/multiselect.scss b/src/styles/multiselect.scss
new file mode 100644
index 00000000..32113230
--- /dev/null
+++ b/src/styles/multiselect.scss
@@ -0,0 +1,107 @@
+/******************************************************************************
+ * Copyright 2020-2020 Exactpro (Exactpro Systems Limited)
+ *
+ * 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.
+ ******************************************************************************/
+
+@import './common/vars';
+
+.multiselect {
+  border: 1px solid #ccc;
+  padding: 0;
+  border-radius: 4px;
+  position: relative;
+  cursor: pointer;
+  user-select: none;
+  color: $primaryTextColor;
+  font-size: 14px;
+}
+
+.dropdown-header {
+  border-bottom: 1px solid #eee;
+  background: {
+		image: url(../../resources/icons/arr1-down.svg);
+		color: transparent;
+		repeat: no-repeat;
+		size: 15px;
+		position-x: 95%;
+		position-y: 50%;
+	}
+  width: 150px;
+  height: 24px;
+  display: flex;
+  justify-content: flex-start;
+  align-items: center;
+  padding-left: 4px;
+
+  &__text {
+    width: 130px;
+    height: 100%;
+    overflow: hidden;
+    white-space: nowrap;
+    text-overflow: ellipsis;
+  }
+}
+
+.dropdown-menu {
+  position: absolute;
+  top: 102%;
+  left: 0;
+  right: 0;
+  z-index: 1000;
+  padding: 5px;
+  background: white;
+  border: 1px solid #ccc;
+  border-radius: 4px;
+  max-height: 400px;
+  min-width: min-content;
+  width: fit-content;
+  max-width: 600px;
+  overflow-y: auto;
+  overflow-x: hidden;
+  @include scrollbar();
+}
+
+.dropdown-list {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  align-items: stretch;
+}
+
+.dropdown-item {
+  padding: 2px 5px 2px 2px;
+  cursor: pointer;
+  display: flex;
+  align-items: center;
+  border-radius: 4px;
+  white-space: nowrap;
+}
+.dropdown-item:first-child {
+  margin-bottom: 5px;
+}
+
+.dropdown-item input[type='checkbox'] {
+  margin-right: 5px;
+}
+
+.dropdown-item.selected {
+  background-color: #f0f0f0;
+}
+
+.dropdown-item:hover {
+  background-color: #e9e9e9;
+}
+