You can add or edit a utility bar at any time. From the Home tab in Setup, enter App in the Quick Find box, then select App Manager. To edit or add a utility bar to an existing app, click Edit in the dropdown menu next to your app. To create a Lightning app with a utility bar, click New Lightning App. Click the Utility Items tab and add the utilities you want. Specify component and utility properties, like the height and width of the utility panel, and what label and icon to display in the utility bar. Some utilities have properties that can’t be changed.
You can add or edit a utility bar at any time. From the Home tab in Setup, enter App in the Quick Find box, then select App Manager. To edit or add a utility bar to an existing app, click Edit in the dropdown menu next to your app. To create a Lightning app with a utility bar, click New Lightning App. Click the Utility Items tab and add the utilities you want. Specify component and utility properties, like the height and width of the utility panel, and what label and icon to display in the utility bar. Some utilities have properties that can’t be changed.
You can add or edit a utility bar at any time.
From the Home tab in Setup, enter App in the Quick Find box, then select App Manager.
To edit or add a utility bar to an existing app, click Edit in the dropdown menu next to your app. To create a Lightning app with a utility bar, click New Lightning App.
Click the Utility Items tab and add the utilities you want.
Specify component and utility properties, like the height and width of the utility panel, and what label and icon to display in the utility bar. Some utilities have properties that can’t be changed.
Refer this link
https://admin.salesforce.com/utility-bar-end-users-best-friend
https://help.salesforce.com/articleView?id=dev_apps_lightning_utilities.htm&type=5
https://resources.docs.salesforce.com/204/latest/en-us/sfdc/pdf/utility_bar_impl_guide.pdf
All Answers
You can add or edit a utility bar at any time.
From the Home tab in Setup, enter App in the Quick Find box, then select App Manager.
To edit or add a utility bar to an existing app, click Edit in the dropdown menu next to your app. To create a Lightning app with a utility bar, click New Lightning App.
Click the Utility Items tab and add the utilities you want.
Specify component and utility properties, like the height and width of the utility panel, and what label and icon to display in the utility bar. Some utilities have properties that can’t be changed.
Refer this link
https://admin.salesforce.com/utility-bar-end-users-best-friend
https://help.salesforce.com/articleView?id=dev_apps_lightning_utilities.htm&type=5
https://resources.docs.salesforce.com/204/latest/en-us/sfdc/pdf/utility_bar_impl_guide.pdf