Actually I have 2 questions about snapping.
If you have a small mesh, lets say a half of a UV Sphere so it has a flat bottom and you have been moving it around for a while. Now when you move it using CTRL it doesnt snap to a grid plane but to the plane where it was located in between the grid lines. How can I get it to snap to the grid plane without have to move it manually to the grid line by zooming all the way in and trying to get it exactly on the line?
Take the same half sphere mesh. Now you want to snap it to a face of another mesh, say a bar, so when your finished it looks like a bar with a rivit head. Again, how can I snap the flat plane of the half sphere to the flat plane of the bar keeping in mind that neither plane is on a grid plane and the bar plane is angled?