Action name: EditStructThis command allows the user to change the structure alignment
Structure alignment is used to calculate the number of padding bytes at the end of the structure. For example, if alignment is 4 and the last field is a byte at offset 11h, IDA will add 3 bytes of padding so that the struct size is 14h (multiple of 4).
The alignment must be a power of 2.
This command is available in the Structures window.
See also Edit|Structs submenu. How to Enter a Number.