I wonder if this is training to immediate switching today, instead of dazing off and coming to later. Since switching is quick, I'm conscience of the next one up, to then fade away.

Switching is usually "activated" by a trigger. A sound, a word, a smell, it could even be the way the light is shining on something that causes you/an alter to be reminded of an experience from childhood that that alter or alters were created to deal with. As an adult, when something triggers you, you do become more "aware" of the switching although you likely cannot yet control that. It's seamless switching, but switching just the same.

What you can learn to do for yourself when that happens, is learn grounding techniques that help keep you or bring you back quickly to the present. Some people keep a rubberband on their wrist and when they sense that they are being triggered, they snap the band to stay in the present. This is not self-abuse. Self-abuse is a harmful activity usually used to reduce stress or distract which in itself causes physical harm. Snapping a rubberband distracts from the triggering event which out causing permanent or lasting physical harm. Some people will choose an object to stare at, a soothing picture on the wall or something interesting when they are being triggered. It just reminds them of where they are.

But, technically, when an alter had been "out" and got into trouble when you were young, and the abuser shook you or yelled at you/the alter, that's grounding. It drew you back into that moment.

It takes patience and practice to learn how to do this effectively but it does help quite a lot.