I'm trying to create a new Essential Graphics template in After Effects.
I have an animation (at its most basic, it's a rectangle that expands from a set, small size to - hopefully! - a user defined size) that can be controlled by moving 4 sliders (it took some fiddling about but I've got a Top Left Null and Bottom Right Null and the 4 sliders control their positions (TL X & Y and BR X & Y), which - in turn - determine the positions for the four corners of the rectangle).
However, having begun setting up the template, I'm slightly worried that this is not going to work. Moving the slider control from within the template window just sets new keyframes (so the animation is all over the place) and, thinking about it now, even if using the template in PP doesn't create new keyframes, how will the EG panel know which keyframe (if any) to affect?
I guess what I'm really wondering is if we can, using an expression, cause the slider controls to affect only the LAST keyframe of an animation (I'm no expression whizz but I can't find anything like that out there following some extensive Googling and I cannot figure out a way to write this myself).
Also, if you think there might be an easier way to do any of this, please let me know!