When they were high gods with full control of an Aspect, they could only sense the forward and backward flow of time. When they became Supreme gods, they could fuse will with all existence in the present across all of space.
After they became limitless, they became capable of fusing with all of reality across time and space. But they were limited to fusing with reality in one timeline.
That has changed now that they have become Absolutes. As Absolutes, they can sense multiple timelines adjacent to their own, and they can leave their timeline to experiment with other timelines.
From what they can sense, those alternate timelines were created with each thought and action of theirs. When they thought to do something, the version of themselves that did the opposite led to the creation of another timeline.
