How can i add custom icons like circle, hand tool

HI all, I need to customize some icons like circle, hand tool, how can i override the icon in angular 8
?Anyone knows please help me UntitledUntitled

Maybe the search function can help you

Basically it’s possible to set css classes and also images for palette actions

Can you tell me way of implement in css.
I tried below code but, i could not see the result on my screen.
.bpmn-icon-hand-tool:before {
background: url(’/assets/img/hand.png’) !important;
Above the code is correct?

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I simply add an image via css, but it’s not working