Via "Smart Dimensioning" or via "Symole for Drilling"?
Try with the first tool.
Edit: You've made your hole with the piercing wizard.
So either you use the smart quote, otherwise you can always remove this symbol by hand by clicking on it, and going to the left pane. In the "quote text" box leave only <DIM>
I noticed something. When I grade my drilling with smart dimensioning, and I modify my drilling, the dimension adds an M in front, and when I put my dimension after doing my drilling, it puts Ø... without the M
Weird....
Conclusion for me, you have to rate the piercings afterwards. And as soon as there are changes in the drillings, you have to re-coast...
The rating can't give you the G1/2, but by the piercing symbols, it should. Since this is not the case, there is a good chance that it comes from the drill symbol configuration file (calloutformat.txt).
Start by locating where it is: Tools/Options/File Locations/Drill Symbol Format Definition File.
Go to this folder via the explorer, and rename the current calloutformat.txt file.
Copy/paste the file I am attaching to you. It's customized, not necessarily the way you want it to, but at least you'll see if it works.