Go to the Chat full screen mode, log in with your account you have created for the chat, then with your trackpad or mouse drag it to the 2 squares in the top right angle of your screen and leave it there, DO NOT PRESS ON IT! wait a couple seconds and a small menu will pop up under the 2 squares, when this menu pops up under your 2 squares find the "Float" option and click on it. and you're done! (if you want to make it perfect but you don't have to, just drag the small window in the perfect angle on the screen)

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Drag your mouse to the green button (Enter&Exit full screen) then if you are in full screen, exit full screen, if you are not in full screen then drag your cursor over the green button and DO NOT PRESS ON IT! instead leave it there for couple seconds and a small menu will appear, just press on the last option in Fill & Arrange (the one with 4 squares) and then just resize the window until the chat fits well in the small window. and you're done!

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If you're in full screen mode either press F11 or FN+F11, if you're not in full screen mode then click the 2 squares between the "-" and "X" and drag your cursor from the angle of that page to make it smaller as possible but still usable, if instead of 2 squares you only have one then just drag your cursor from the angle of that page to make it smaller as possible but still usable

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