Hi, Thanks for the reply.
I want to point out somethings.
1) blue dotted line which represents constraint link only shows up in object constraints only not in bone constraints(in my case maybe because of some setting. let me know if there is some setting like that)
2) These techniques do not apply on modifiers like Mirror modifier in which you can select other object’s region for mirror axis.It doesn’t show any information regarding what object is used in outliner (maybe its a extreme case)
3) Last point in which you said
“If you select the cube and choose “Select Grouped” as under point 3) and then “Siblings”, you get the objects marked which are driven and constrained by the cube in the example file:”
This doesn’t work like that. it selects all the siblings whether they are driven by cube or not (I think it works at it should but your statement is little misleading).
Apart from that Thanks for helping me. I didn’t knew that I can check drivers through outliner like that.