snap vertex to vertex and remove double


Is there a quick way to snap a vertex to another vertex while it is being dragged, and then also remove the doubled vertex.

Also is it possible to select all vertices along the edge of a mesh and particularly along the edge of a hole in a mesh.



well you can select two vertics and W key >> merge >> at center/at cursor. and thus merging two vertics.
to remove doubles: w key >> remove doubles (you can change the thershold in the edit menu (f9))
to select vertics along an edge alt+click the edge (only in 2.35!)