Chart settings/ Bar sizes

My bars in the chart are a bit small and it is difficult to see individual bars which is important in trade evaluation.. how do i go about fixing it - some sort of trial and error?

Also, on my 15 min chart - i dont see few hours on x-axis (like 3:00 AM on Sep 19) - how do i make these adjustments so i can see all 24 hours time frame (because i am trading Futures which are on GLobex - almost 24/5 time scale in the week)

intraday%20hours

Just ZOOM chart (use magnifier icons in the toolbar or Ctrl+Mouse wheel or scrollbar) to whatever you wish. Users' manual: http://www.amibroker.com/guide/h_charting.html

Thanks - I was able to do so...but i was looking to see for any presets...i saw number of bars in tools/preferences and will play with that