how to modify selected shape within a Sketch to extrusions to bodies are automatically updated? (f3d file included)

[gregVUG8E]

Question: how to modify selected shape within a Sketch to extrusions to bodies are automatically updated? (f3d file included).   

Background:  So sketching (used "fit point spine") a object in a sketch to start with, then adding lines/circles.  I used a specific "shape" from within the sketch to then Extrude to create a body.   

What I'm after:  Trying to make the design so that I can go back into the sketch and modify it (maybe add lines/circles etc) as a means to slightly modify the shape that was extruded, however how do you do this.  I'm not sure that I can "join" lines/circles to create a "single polygon" object in a sketch for example, then perhaps I could have said the extrusion was from this defined polygon, then I'd then have to find a way to modify the polygon.  

For example in the attached model you see I've added a small "fit point spine" area, so for example if I wanted to add this to the area that was extruded (without having to redo the extrusion). 

Aside - I noted I couldn't get "fully black" points for the "fit point spine" points...(?) 

[davebYYPCU · Accepted solution]

Change the sketch, depending on what’s changed, 

you can bust the Extrude, it will sometimes update, and sometimes ignore the changes,

edit the extrude and select what is required.

Fully constraining Splines is a weeks work.

Might help.

[gregVUG8E]

not really sure how to "edit the extrude" to include another area from the sketch

[davebYYPCU]

Same as create Extrude,

mouse click the areas required, click to select, click again to cancel that selected area, when done press Ok / Enter.

[g-andresen]

Hi,

The GIF shows what @davebYYPCU has recommended

günther

[gregVUG8E]

ok thanks - I googled to see where you got "edit feature" from and I see you can do this against the timeline for the extrude....didn't know about this...works well and lets me adjust what I extrude into the body.