Excel has more than 500 shortcuts (source: the developers) and some of them are amazing like Ctrl + D with the graphic objects 😎
Standard use of Ctrl + D
The shortcut Ctrl + D copy Down the contain of your active cell (value or formula).

But for this, the easiest way it to use the fill-handle. So in this situation Ctrl + D is really not helpful 😕

Use Ctrl + D with graphic objects
But, if you work with graphic objects like charts, shapes or icons, this shortcut is really great 😍
Import an icon
For exemple, let's import the symbol man from the menu Insert > Icon

Then, in the next dialog box, you search for "man" and you select the following icon

Crop the icon
Once the icon has been added to your worksheet, you can see that there is extra blank to remove around the icon.

To do that, we must cropped the icon with the option Graphics Format > Crop

Now here is the steps to remove the blank part around the picture
- Click on the Crop icon
- Remove the blank part
- Click again on the Crop icon to keep your changes

Duplicate the icon
Now, let's see how to duplicate this icon to create a series of icons like we did for our custom people charts.

This is where the shortcut Ctrl + D will be very useful
- Select your picture
- Press Ctrl + D
This action will duplicate your pictures, icon, chart. But the result isn't acceptable 😵🥴

Adjust the position of your icon
Of course, the position proposed by the duplicate action isn't the one we want. So, let's move the picture to the correct location.

NOW, here is the secret of Ctrl + D
- We have used Ctrl + D to duplicate the picture.
- Then we have moved the duplicate icon to the position we want.
- AND NOW, the next Ctrl + D ...... will duplicate the icon AND KEEP the previous move 😮👍

With this shortcut, you save a lot of time with the position of your graphic object 👍😍
