Add a button "Check Constrained" on the Sketch Palette.

[huguesacker]

Please add the button "Check Constrained" at the bottom of the Sketch Palette, besides the "Stop Sketch" button, and the new button to be linked to the text command "Sketch.ShowUnderconstrained".

Actually, it is the command that we launch when unable to find why a sketch is under-constrained, through the text commands interface.

The label of the button could be also "Show Under-Constrained", or whatever best suited. This should be easy to program, since the text command already exists, and is freely available through the text command interface, but is pain to launch (show the interface, then type the command, then correct any mistyping, do it again etc.).

This would be a very good help when making sketches. Please see picture below, and button at the bottom:

idea-show-underconstrained.png

[untrustedone]

It would also be nice to tell what something wants. So often there is a blue line and i can't move it but it still stays blue.

[bergamot]

I've seen other constraint systems with a button that makes underconstrained shapes "jiggle" a little bit along their axes of freedom, so you could very easily see that a line you thought was vertically constrained actually isn't, etc.