Almost anything is possible, however useful is another matter. Likely more sensible would be to add the pin numbers to the pico breadboard view (although that is non standard as the real pico doesn’t have the pins numbered which is isn’t done in the current part.) Note that hovering over a pin will bring up the description of the pin like this which may do what you want on the current part.
It is possible (but a lot of work) to create a custom part that does this. A sketch with two breadboards and the power strip referred to in a post earliet this morning would be the probably most sensible option here.
I’m printing the images for my students, so hovering/ToolTip is unfortunately not a solution.
I’m soldering the header to the pico the other way round, so that they see the pin numbers. That’s why I would like to have the pictures in the teaching material the same way.
Thanks for pointing me out, that two breadboards would do the trick.
Done (I replaced the original .fzpz above.) Note you will need to delete the current version in the parts bin, then restart Fritzing before it will let you load the new part.