Remove Doubles

Sometimes, you may accidentally end up with duplicated vertices at some points of your mesh. Remove Doubles lets you automatically merge all the vertices that are very close to each other inside a range you can define.

To use the Remove Doubles tool:

1. Select the part of the mesh in which you want to remove double vertices. Usually, you want to remove them from the whole mesh, which you can select with A.

2. Press W to access the Specials menu and pick the Remove Doubles option (by default, it lacks a shortcut). In the Info area, usually at the top of the interface, you’ll get a notification displaying the number of vertices that you removed.

After using this tool, you can go to the Operator panel and change the merge distance. At its minimum, it will only merge the vertices that are in the same exact position, but you can increase it to merge vertices that are close to each other. Remove Doubles is only applied to the selected vertices, but you can activate the Unselected option to include the unselected vertices that are very close to the selected ones.