1. A mobile device comprising: one or more data processors that execute instructions that cause the one or more data processors to perform operations comprising: measuring a relative orientation between a document and the mobile device; and comparing the measured relative orientation to a threshold relative orientation associated with a document capture mode of the mobile device; and an action component that performs operations comprising: automatically transitioning the mobile device to the document capture mode when the measured relative orientation is within the threshold relative orientation associated with the document capture mode, wherein the threshold relative orientation is based on an analysis that includes: analyzing occurrences when a user of the mobile device rejected automatic launching of an application that performs actions in response to text captures; and analyzing occurrences when a user of the mobile device manually launched the application that performs actions in response to text captures.