Abstract: Methods, systems, and apparatus, including computer program products, for aligning user interface elements arranged in multiple columns in a user interface. In one aspect, a method includes identifying a group of columns in a user interface, where each column in the group includes one or more user interface elements arranged in a sequence from a top of the column to a bottom of the column; comparing heights of first sequences of one or more user interface elements in a first column to heights of second sequences of one or more user interface elements in a second column; and adjusting the heights of the first sequences to align the first sequences with the second sequences by adjusting the heights of user interface elements in the first sequences, where adjustments to each user interface element in the first sequences are each less than a threshold adjustment value.

Abstract: A system includes receiving information regarding a first keyword associated with a user, where the first keyword is usable by a content distribution system to select content for distribution based on keywords associated with the user. The system also includes obtaining an attribute associated with the user; identifying at least one keyword category corresponding to the attribute; and selecting at least one alternative keyword associated with the at least one identified keyword category. The selecting may include consulting a taxonomy database to identify alternative keywords that are relevant to the first keyword. The system also includes ranking the at least one alternative keyword according to a ranking rule associated with the at least one keyword category associated with the at least one alternative keyword; and providing information associated with the ranked at least one alternative keyword to the user for selection by the user.

Abstract: Methods, systems, and apparatus, including computer program products, for aligning user interface elements arranged in multiple columns in a user interface. In one aspect, a method includes identifying a group of columns in a user interface, where each column in the group includes one or more user interface elements arranged in a sequence from a top of the column to a bottom of the column; comparing heights of first sequences of one or more user interface elements in a first column to heights of second sequences of one or more user interface elements in a second column; and adjusting the heights of the first sequences to align the first sequences with the second sequences by adjusting the heights of user interface elements in the first sequences, where adjustments to each user interface element in the first sequences are each less than a threshold adjustment value.