+C-x C-k b Bind macro to key (0-9, A-Z)
+C-x C-k C-e Edit last macro
+C-x C-k l Edit recent keys as macro
+C-x C-k r Apply macro to region lines
+```
+
+# Registers
+```
+C-x r s <?> Copy region into register
+C-x r i <?> Insert text from register
+C-x r Space <?> Save point position to register
+C-x r j <?> Jump to point position at register