Cannot select vertices from different object while in edit mode Whenever I enter edit mode, with 2 separate meshes (cubes), I can only select vertices/edges/faces of 1 mesh.

Example (the screen shot did not include the mouse cursor):



Also, when I enter edit mode with both meshes selected, one of the meshes has a red border and cannot be selected (it also has this border in Object mode):
In order to make the both meshes editable at the same time you need to join the objects in object mode while they are selected using CTRL+J, then both meshes will be available in edit mode.

Another way is to install MultiEdit addon that will allow to edit selected objects simultaneously.