Hi there,
How do I set up to move the arrow key and click on three dots as in the image below?
I know the way of found the image however this works when the size of screens or windows is not larger or smaller. (it captures exactly the same size as the image)
Is there any way to make a setting work regardless of the size change? 
We can achieve your goals, but perhaps not in the way that you want. What you want is for Find Image to find an infinite number of sizes for the image, from 10 points to 1000 points. The Find Image action cannot do that. Although Find Image is fast, it's not fast enough to rescale the same image to 1000 different sizes and search the entire screen for each of 1000 different images (that would probably take a minute of CPU time to find a single image.)
Typically, when the image that you want comes in only a few sizes, say 5 sizes, it's quite easy to create five Find Image actions which are looking for five different image sizes. I've done this before, and it works well. But I don't know what app or browser/website you are using here.
In your case there may be even simpler solutions. In order to find those simpler solutions, you may need to tell us what the app is that is displaying the images that you want to find. Is it a browser? If so, which browser? Some browsers may be able to report to KM what scaling value they are using, which could simplify your problem. And if it's a browser, a good solution may be easier to find if you are willing to tell us what website you are accessing. Some browsers on some websites might have adequate AppleScript (Javascript?) support that KM can access through its Button action. For example, the buttons on this website can be accessed using the button actions, like this: (this is how to press the Reply button on this page...)
There might be a name for the button on your app/website corresponding to the three dots.
P.S. In my experience, looking for three grey dots isn't a reliable image to search for. I see to the left of your three dots is an icon consisting of several different colours and a face. That would be a better image to search for, and then add about 50 pixels to click to the right of that image.
Thank you for the explanations and tips.
To answer to your question, I am using Google Chrome browser on the lastest Mac OS.
I think Google Chrome has 23 different levels of zooming allowed for web pages. That's a lot, but it's still possible to have 23 Find Images that search for your icon. You could even put the most common icon sizes first, so the number of Find Images that has to be executed could be smallish, like maybe 5 or 10. That would still be pretty fast. Perhaps like the following... In this example, I'm showing you how to use Find Image for two different sizes of dots. If the first one isn't found, it will return the empty string to %FoundImage% which means that the second Find Image action will attempt to find a different size of the same image.
Yes, creating 23 of these actions in a row would seem like a lot of work, but it still shows that it can be done and you probably wouldn't even find it to be slow.
You should also attempt to solve this problem using the Button action that I mentioned. This would be much easier, if it works.
I could go to a different account with the setting as the first image for the 2nd one (I wanted to open a different account with one keystroke).
What if I want to go to account with number 3 (in the 2nd image) regardless of its position? Since the order of Google accounts could vary.
do I have to set up like this ? 
1st image
2nd Image
Google's three dots is always in the same position in Chrome browser. To click on the three dots, you just need the Move and Click action. Just make sure to use relative to the "front window's top right corner".
Although I can't test for you (because I won't use Chrome and because I can't read that language in your screenshot) I can still say to you that Find Image is viable but it is MUCH better if you investigate whether the Button action or some other Javascript solution will work. Those alternatives don't have to worry about zoom levels. So I think you should stop trying to solve this problem with Find Image (if you really want to solve the problem for any Zoom level) and ask for someone with Javascript experience to help you.
Or just try the button action - I can't tell from your response if you checked if the Button action works with your menus. I suggest that you carefully read every word of the following page and use that advice to determine if your menus are compatible with the Button action.
