Draw directly on texture [Solved]

[rafradek]

Edit mode: Paint
Location: left panel
Function name: Texture
Function icon: idk

Function action details:
the panel opens, revealing a texture selector and the selected texture. Regions that are mapped would be tinted. Paint tools that already exist could be used.

[Sphax]

In 2.7 you can edit texture by clicking on the the "Edit" button in UV editor or selecting "Edit texture" in Material Manager.