| CPC G06F 40/197 (2020.01) [G06F 40/103 (2020.01); G06F 40/169 (2020.01); G06Q 10/101 (2013.01); G06Q 10/103 (2013.01); H04L 67/10 (2013.01)] | 20 Claims |

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1. A method comprising:
determining that a host application receives an action regarding a document, wherein the action comprises a user change made to the document via the host application;
adding the action regarding the document to a unified stack that is associated with undo commands, wherein at least a portion of the document is editable via the host application and a secondary application;
receiving an undo command from the secondary application; and
responsive to receiving the undo command, causing the user change made to the document via the host application to be undone in the secondary application based on the action regarding the document in the unified stack.
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