If you would like to change the periodicity of any chart, just bring the chart to front and start typing any number.  The "Periodicity" control will appear with the number you typed already placed into the Intraday Bars group box.  You can now click on any of the buttons on the left to switch to those periodicities (the buttons labeled simply with numbers represent number of minutes).  You can also build your own customized periodicity by using the group box on the right.  Once you have got your periodicity set up properly, just click "OK" or hit the "Enter" key on your keyboard and the chart will update with the new periodicity.  
There are a few shortcuts available with the Periodicity control.  Type the D key to quickly switch to daily periodicity.  Similarly, type W or M to switch to Weekly or Monthly.  Type T to select the "Ticks Per Bar" intraday periodicity.  Similarly, type "I",  "R", "C", or "V" to select "Time Per Bar", "Range Per Bar", "Change Per Bars", or "Volume Per Bar".  So if you're looking at a chart of any periodicity, and you want to switch it to daily, just type "1d".  If you're looking at a 1 minute chart, and you want to switch it to a 13 minute chart, just type "13 Enter".