yeah,it worked..thank you so much
This is how achived it:

wm = 100;

wf = 496;

R = wf/Math.SQRT2;

center = [540.7397,627];

r = length(position,center);

wa=wf+((r/R)*(wm-wf));

ws = linear(r,0,R,wa,wm);

[ws,ws]

I tried it like “center = [100,300];” this. But then the whole code is not working.

Thanks, it’s almost working but what if I don’t want the center value as the center of the composition. I want it something like [200,300] as I declare. Do you have any idea how to do that?

In the beginning, the image will be in the center box and its size will be Wf and I can drag it to left/right/up/down. Its size will change according to the logic of the image I attached. As this scaling will depend on the position I can’t figure out how to do it. How can I achieve my desired result?

It’s like at first the image will be in the center and the size will be Wf. It can be dragged to up/left/right. After placing its size will be Wm. But in the way of dragging its size will also depend on the x,y value of the position. Now my query is how to link or use expression so that I can get my desired result?