Like this
Say i record a very short macro
Move mouse here delay 140ms
click mouse here delay 50ms
move mouse there delay 360ms
click mouse here delay 80ms
Now with random ms offsets it would be like
Move mouse here delay from 140ms to 200ms
click mouse here delay from 50ms to90ms
move mouse there delay from 360ms to500ms
click mouse here delay from 80ms to 160ms
the original delay 100ms but not more than 1.5x or 1.3x the original ms delay. Which would be at max 150ms or 130ms, so it would be anything from 100 to 150. Ofc there are auto clickers that have this option. But really adding random millisecs to thousands of lines of mouse movement and clicks is ridiculous.