Thanks for fast answer Michael.

For my problem - to find visualy similar angles of surfaces i think will be better to have automatic ability made it different color when this lines on custom angle not 0\90\180\270\360.

I propose when in scene you have two or more same angle constraints - bind them a one special color. If someone add them on one angle and with custom angle i think this have sense to visualy made it clearer(For some reason user made it a couple versions and i think it can improve user expirience). When this construction lines more it can be a mess.

I think also add checker box to change it from gray to multicolor made sense too, or make also not vivid colors