Comments start with the double slash //. Everything after // to the end of the line is ignored by the compiler.

To comment out multiple lines or a part of the line, use block comments {}:

0001: wait {comments here} 0 ms

Since version 3.06 Sanny Builder also supports the C++-like comments /* */.

0001: wait /* comments here */ 0 ms

To comment out or uncomment multiple selected lines of the code press Ctrl+Q (this hotkey is configurable in the options).