16. A computer-implemented method, comprising: monitoring for changes to primary content of a document that includes an ink annotation; ascertaining that a threshold change occurs to the primary content based on the ink annotation being a threshold distance from the primary content; creating an annotation layer for the document that includes saving the ink annotation and a snapshot of the primary content prior to the threshold change to the annotation layer and removing the ink annotations from the primary content; and enabling the annotation layer to be accessed separately from a current version of the document.
16. A computer-implemented method, comprising: monitoring for changes to primary content of a document that includes an ink annotation; ascertaining that a threshold change occurs to the primary content based on the ink annotation being a threshold distance from the primary content; creating an annotation layer for the document that includes saving the ink annotation and a snapshot of the primary content prior to the threshold change to the annotation layer and removing the ink annotations from the primary content; and enabling the annotation layer to be accessed separately from a current version of the document. 17. A computer-implemented method as recited in claim 16 , further comprising causing a visual affordance identifying the annotation layer to be displayed along with the current version of the document.