Within a slime macroexpansion buffer some extra commands are provided (these commands are always available but are only bound to keys in a macroexpansion buffer).
Just like slime-macroexpand-1 but the original form is replaced with the expansion.
The last macroexpansion is performed again, the current contents of the macroexpansion buffer are replaced with the new expansion.
Close the expansion buffer.
Undo last macroexpansion operation.