Occasionally I get the question, does Dynamics CRM/365 include an undo/redo feature.
While the application does not have an undo button, it does support the features of your operating system, and if that OS is Windows (any version), you can use the keyboard shortcuts CTRL+Z to undo, and CTRL+Y to redo.
Note that this is limited to undo/redo in the current field. It’s useful if you overwrite a field value by mistake, but keep in mind that if I tab or click to another field, it won’t undo what I did in the previous field.