Correct Answer: In GUI testing, need to cover the customer requirement if don't have to validate Font size, colors, spellings(labels) etc Every application should follow Microsoft rules like - Controls should be Initcap (ie every label should start with Capital letter )Can observe that in Win applications every label starts with Caps - OK or Cancel button should exist - Controls should not be overlapped - Controls should be alligned properly (left side alignment is mandatory but the right side is optional) - Controls should be visible - Short cut keys should be provided - System menu should exist (ie if u press Alt key + Space bar a menu will appear at the left most corner ) - Mouse pointer events Colors, Label Names, Tab Order, Alignment, graphs , Navigation of the software to test in GUI Testing