Now use the keyboard shortcut CMD-V and the folder icon will be replaced with the image you copied. Want to switch back to the default folder icon? Open the Get Info* panel, click the icon ...

While the default folder icons in File Explorer look decent ... and select “Unpin From Quick Access.” Switch File Explorer to ...

Read: How to change File and Folder Icons. As an example ... Note: If you constantly switch themes, then make sure the Allow themes to change desktop icons option is unchecked, to avoid themes ...

For that, search for file explorer options (earlier called Folder Options ... Explorer Options first. Then, switch to the View tab and find the Display file icon on thumbnails option.