How can i get rid of the slider thumb ghost?

Dec 06, 2023

I am simulating a twist throttle for a stock picker (in the forklift family). I want to use a slider, but make it invisible.

I don't want to use the throttle image as the thumb, because I don't want it to move. The operator uses a forward and backward twisting motion to increase and decrease speed.

  • I set the track to no fill.
  • I removed the outlines for both the thumb and the track.
  • I set the thumb fill to 100% transparent.

What is left is a ghost of the thumb. Does anyone know how I can get rid of the remaining thumb outline shown in the attached image?

7 Replies
Glenda DeHoff

The movement is not intuitive. It is not like driving a car. So it was something I wanted them to "practice" in the course. That way when they get to the hands-on portion of the training, it may feel a bit more natural. I am not changing the state of the underlying image - there is not a lot of visual change to the throttle.

The farther they turn the throttle the faster they go. I was thinking of possibly a speedometer or maybe a crash if they go too fast. Another thought is to change the sound of the engine.