i would like to know this to...also i think this is wrong section :/
Where else could this go? General Modification? No.
Yes.Have you tried flipping their normals or deleting and remaking them?
Right Click the 3D window and untick show back-faces, if they disappeared that means they are backwards.
All I need to know is how to select one vertice at a time. Like you select files with Ctrl.
Vertex mode then click the dots.
Hold shift down.