Need to make object show no matter what - like x-ray button on armatures

That’s pretty much the gist. Have object A that will pass through object B and C, need to know how to make object A visible and unaffected by objects B/C without changing the transparency of objects B/C.

I’ve looked all over for about a week and finally gave up. Thanks in advance for your help.

Properties Window > Object > Display > X-ray