As Overlay: This is the classic method of displaying Dashboard, as an overlay over the regular desktop.  Select your selection from the drop-down menu.
You can now exit system settings.
Access the overview
There are several ways to access the overview, but the most common is to use the F12 or Fn + F12 keys (depending on the type of keyboard you are using). If you press the F12 key, either the Dashboard appears as a space that slides into place, replacing the current desktop or other active space, or as an overlay on top of the current desktop.
There are several ways to access Dashboard after turning the feature on:
Start the mission control setup panel, as you did before.
In the Keyboard and Mouse Card section, you can assign keystrokes or mouse buttons to perform specific tasks. Look for View Dashboard text. Next to the text are two drop down menus; The first one can be used to assign some function keys, F1 to F19 (the keyboard may not have all 19 function keys). You can also use the Shift, Control or Command buttons in combination with the function keys to create up to 57 possible key combinations to access the dashboard.
If you prefer to use the mouse, the other drop-down menu on the right will let you choose between up to seven different mouse buttons to access the Dashboard environment.
(Hot Corners allows you to access Dashboard by moving the cursor to the specified corner.)
Hot Corners is another way to access the overview. With this method, you can simply move the cursor to one of the corners of the screen and the dashboard appears. To configure Hot Corners, click the Hot Corners button in the options panel. In the drop down sheet, select the drop-down menu that corresponds to the view window you want, and then select Dashboard from the drop-down menu. Click or tap the Dashboard icon in the Dock to go directly to the Dashboard. Chances are there's no Dashboard icon in the Dock under Mojave, but it's easy to put it back. In Finder, open the Applications folder, and then drag the Dashboard app to Dock.
Do you prefer to use movements? It is also possible:
- Dashboard enabled as a space: You can use standard two-finger swipe left or right to move between spaces.
- Dashboard set as an overlay: You can use a drag your finger up to open Mission Control, and then select Dashboard from the spacebar.
To exit Dashboard and return to the desktop:
- Press the Escape key.  Touch the arrow icon at the bottom right corner of the dashboard.
- When the Dashboard is used as an overlay, click or press an empty space in the dashboard.
Adding Dashboard Widgets
Make sure you have the Dashboard environment open on your Mac, and then click the plus icon (+) in the bottom left corner.
This will show all Dashboard widgets installed on Mac.
Click or tap a widget and it will be added to Dashboard.
Removing Dashboard Widgets
To remove a Dashboard widget, open Dashboard.
Click or tap the minus signature (-) in the lower left corner of the Dashboard.
After a moment, each widget will have an X displayed next to it. Click or touch an X to remove the corresponding widget.
(Using the Remove button, all widgets will show an X. Click X to remove a widget.)
Note: Removing a Dashboard widget does not delete the widget from your Mac. The widget can be reinstalled in your Dashboard using the instructions above.
Download New Widgets
Apple used to have a fully automatic method for downloading and installing widgets. Although the automated aspect of the process is over, you can still add more widgets to your collection using Apple's old and no longer supported Dashboard download location.
Open a Finder window and scroll to the ~ / Library folder. 19659002] Check to see if you have a Widgets folder present. If not, you can create a Widgets folder in the ~ / Library folder.
Visit the Apple Widgets Download Center at: apple.com/downloads/dashboard/
Browse the widgets library. When you find one you like, click or click the Download button.
The widget file is downloaded to Safari's default download location, usually the download folder.
Make sure the overview is not open.
Move the new widget file from the download folder to the Widgets folder you created earlier.
Open the Dashboard environment and use the instructions in Adding Dashboard Widgets above to install the new widget on Dashboard.
(Apple's old widget for downloading widgets is still available using the link above.)
Create Your Own Widgets
You can create your own widgets using Safari. This type of widget is actually a mini browser that will display a cut section of a web page. Want to know the local news headlines? What about sports points? Perhaps you want to know what new hardware is being presented on OWC's website.
All you have to do is start Safari and go to the website that contains the information you want to track.
When the site loads, in Safari choose File, Open in Dashboard.
A small square outline is displayed. List the area of the site you want to capture. Use the anchor points on the dashboard to expand or expand the size of the box until it covers the content you want to capture.
Once you have chosen the box, click the Add button in the banner at the top of the browser page.
The web clip will be added to the Dashboard.
(Use Safari to create a Dashboard Web Clipping widget. The Web Clippings widget shows the contents of any selected website or part of a Dashboard site.)
Dashboard Wrap Up
The dashboard may have been disabled in Mojave, but almost all of the features and features are still present and require just a simple change in a setting to turn the Dashboard back on.
The only missing part of the Dashboard environment was the easy way to browse widgets, download and install them, all with just a click. Although the simple installation is gone, the method we described is to drag and drop a widget in a widget folder, simply by itself.
If you have not used Dashboard and widgets earlier, this is a great opportunity to try them.
Note: Some widgets available from the Apple widget download site have not been updated for some time and may no longer work properly.
Additionally, some widgets use Java and require the use of a Java runtime environment. If you need to use Java, make sure you install the latest version available from Oracle and keep it updated.