Callionet Yes, you can use multiple sliders at the same time.
Sliders function similarly to constraints. You can adjust their mix values to fully apply, partially apply, or disable them during animation.
The order in which they are applied also matters. Just like constraints, items that appear later in the order (lower in the tree view) will overwrite the effects of those applied earlier. Therefore, when using multiple sliders simultaneously, it’s important to keep this in mind.
One key difference from conventional constraints is that sliders use a system allowing animation mixing. This means they can also handle attachment switching and slot color changes.
That said, please note that a joystick feature is being considered for future implementation, and the slider itself is not specifically designed for controlling facial orientation.
While sliders are highly convenient, trying to manage the entire rig with them alone would require creating a large number of sliders. You’ll also find that, although each slider can specify a target bone, it cannot control multiple types of transforms at once, which makes management more complex. (For example, it’s not possible to use a single slider to control both the horizontal and vertical movement of a face via TranslateX and TranslateY on the same controller bone.)
It’s easiest to understand through experimentation, so I would be delighted if you could give it a try yourself.