Answer 1

You mean: to store resizable frames after user have modify them?
It was not design for that... but with javascript, you can get the dimensions and store them for reuse on a non resizable frames set ( and/or convert them if you want, ie: percentage ): in this case, the saving built-in function to get real element sizes is:
window.getComputedStyle(elementHTML);
which return a CSSStyleDeclaration object that can be read access like the 'style' attribut of Html elements:
var e = document.getElementbyId('someId');
var s = window.getComputedStyle(e);
var c = s.color;
var b = s.backgroundColor;
var m = s.marginTop;
... and so on.