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Some symbols are missing from the palette and your use case requires them. The palette can be customized and it requires a little preparation.
The documentation gives the broad instructions to add them. video: https://support.ptc.com/help/creo/creo_pma/r6.0/usascii/#page/other_modules%2Flegacy%2FTo_Define_a_Symbol.html%23
Once the symbols are added to your palette, then you'll be good to go.
here is a video from David Martin: https://www.youtube.com/watch?v=TZLOIb-dUp8 and from 4K side: https://www.youtube.com/watch?v=zJrea53xtG8