The History panel Window > Panels > History records all operations you perform with glyph contours, glyph metrics, kerning or glyph info.
The History panel displays the list of operations and a few buttons:
Operations on the blue background are applied operations. Those on the white background were undone. Click Undo & Redo buttons below the list to roll back and forward or simply click the particular line.
|Record||Takes a snapshot of the current glyph outlines and remembers it in memory for further interpolation|
|Rewind||Interpolates back to the remembered snapshot|
|Fast Forward||Interpolates from the snapshot (taken with Record) to the current glyph outlines|
|Undo||Cancels the last operation on the blue background|
|Redo||Performs the first operation on the white background|
For information on using Record, Rewind, Fast Forward (Tools > Rewind menu) see the Rewind Record article.