Hi Danny,

> In regards to the Extrude command, if you execute the Extrude command first then try and
> pick edges on a surface you can't drill down further to pick an edge, in saying that, turning
> on the edge filter works in picking edges.

I can't seem to make that happen over here.

Is it possible you have the surface selected before you did the Extrude command? Because the extrude command can take as input either curves/edges or also single surfaces as the thing to extrude. If you have a surface preselected it will use it as the prepick input and not ask you for anything else.

Here's what I tried - start with an empty scene, draw a plane, leave it unselected. Now run Construct > Extrude. Since there is nothing preselected it will ask you to post pick the inputs, I don't seem to have any problem at this point doing drill-in selection to select edges. Are you doing a different sequence than that?

- Michael