I have run into this a few times, did a search and couldn't find a previous thread on this.  I opened up a simple previously drawn flat part.  The sketch says it is under defined but every item is just a dark grey - no blue.  How do you turn that option on or revert to the default of fully defined items being in black, under/un defined items being in blue in a sketch?  Look all over at the options and couldn't find it.   Thanks.