B&W Slider Question

[Maze]

So question for those that use the B&W Slider. Will the slide lock in any position along the rail or is it just all the way forward or all the way back?
Maze

 

[Chief2hairs]

So question for those that use the B&W Slider. Will the slide lock in any position along the rail or is it just all the way forward or all the way back?
Maze

It is either all the way forward in the pulling position or all the way back for backing up.