Changing sketch dimesion doesn't move items

[SuperTech459]

I need to change one one of the earliest dimensions (The 70mm center circle). However, when I do, only a point moves and not the circle; or anything else.

I don't want to use the move commend since I read it's poor practice (why is it there then?).

It's probably a simple mistake, but I can't find it. Constraints are still somewhat confusing, and there's one next to the circle center I don't recognize (not the concentric). Also, there's much I don't yet understand (but I'm trying).

The sketch is Base:Surface (first in the time line).

Thanks.

[jhackney1972 · Accepted solution]

If you would properly dimension the sketch circles, you could drag them off and see why the 70mm dimension does not affect them.  The Video will show you how.

[SuperTech459]

Thanks. That is very helpful.

I've been studying constraints and am slowly wrapping my head around them. So, everything in a sketch should have a constraint, correct?

[jhackney1972]

All sketch entities should be fully constrained either using sketch constraints or dimensions.  Normally you can tell this condition when the sketch changes color.