identifier
identifier is used to write down notes of animations, actions and anything we find important to make note of
identifier is a visual reference

class
set a class name for this helper css, match it with the resizable   helper css   property   see here

opacity
set opacity

border color
set border color

border size
set border size

border style
set border style

background color
set background color

background image
set background image

background image repeat
set background image repeat
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more info on   module | CoreUI resizable   see here Overview
more info on   module | CoreUI resizable   see here Properties
more info on   module | CoreUI resizable   see here Properties Resizable Handle Css
MODULE COREUI RESIZABLE HELPER CSS - PROPERTIES
TOOL