By default Metatrader will show any newly created chart object on all timeframes.
This handy utility will set the visibility of any new chart object drawn to be that of the current chart only.
e.g. If the chart timeframe is H4 then a new object will only be visible on the H4 timeframe.
Each object type can be included or excluded as required and, of course you can change the timeframes setting afterwards as this only operates at the point the chart object is created.
Add to your chart and forget about it - it really is that simple!