How to get html address of image in library?

I'm trying to use an api script to set an avatar image.

In the api help it says, "You must use an image file that has been uploaded to your Roll20 Library" and "You can view an image's source URL using the developer tools of your browser."

But I dont know how to do this, and google isn't helping me find out. 

Normally when i want to inspect an element on a web page, i rightclick the element and select "Inspect", but roll20 has its own right click menu and that option is not available to me. 

Can someone give a step by step guide how to do it?

You can place the image on the tabletop and press z to zoom it in. In this form, the normal right-click menu is available.

Here's a little test script I use to grab the image source this this macro: 

on("chat:message", function(msg) { // use with !getImageSrc @{target|token_id}
  //This allows players to enter !sr <number> to roll a number of d6 dice with a target of 4.
  if(msg.type == "api" && msg.content.indexOf("!getImageSrc") !== -1) {
    var argsFromUser, targetID, targetToken, targetImgSrc;
    argsFromUser = msg.content.split(/ +/);
    if (argsFromUser.length > 1) {
        targetID = argsFromUser[1];
    	targetToken = getObj('graphic',targetID);


    	log("targetToken: " + targetToken);


        targetImgSrc = targetToken.get("imgsrc");


        log("targetImgSrc: " + targetImgSrc);
        
        sendChat(msg.who, " " + argsFromUser);
        sendChat(msg.who, " " + targetImgSrc);
        
    }  else {
        sendChat(msg.who, "didn't see any arguments: " + argsFromUser);
    }
  } else if(msg.type == "api" && msg.content.indexOf("!getTime") !== -1) {
        getTime();
  }


    
});

Plex..... might be worth turning it into a "thumb" since API will require that.

I didnt know that, Jakob. Great.

Plexsoup, thanks for the script. I'd already found The Aaron had done a script to do the same thing here: image address script.
I like that your version doesn't require to select an image first. 

Stephen actually asked this question last week: https://app.roll20.net/forum/post/4548528/any-scri...

I posted a script I wrote there for such. 

Haha, The Aaron, my post just before yours refers to that exact script.

In my recent browsing of the api scripts form, i have noticed just how many fantastic contributions you have made. You are a great asset to the community. 

The Aaron is massively prolific! Also, super helpful and quick to respond.

I'd be more prolific if I could get a few hours to work on things. :)