To visualize or change the timeframe of any chart you can use the period buttons on the timeframe toolbar:
Also, you can use the submenu button 
in the standard toolbar.
Whatever period you choose, this will reflect as an individual bar or candle in the chart. For example, if you choose H1, this means that each bar or candle corresponds to one hour of price action, with its specific Open, High, Low and Close prices.
Using two charts with different timeframes for a specific currency pair might help to assist your trading decisions. For example, if you check H1 and you spot a selling opportunity, having a parallel daily chart might help you confirm a trading signal:
