Hi Gary,

In my version of Excel they are. Try it with a line chart. In Excel 2007
you might have to make an adjustment. We need more info.

With a data table the markers are placed between the vertical gridlines, if
you don't like that you can remove the data table and then format the X-axis
by choosing the Scale tab and unchecking Value (Y) axis crosses between
catergories.

If you want both of these features you can screen shoot a data table and
place it on a chart that doesn't have a data table or you can place the
equivalent of the data table in the spreadsheet and put it directly below
the chart.

Cheers,
Shane Devenshire
Microsoft Excel MVP

"Gary" wrote in message
...
Firstly, I noticed that a vertical gridlines of the chart are not align
with
the gridlines of the data tables. I am wondering how it can be aligned.

Secondly, I also noticed that a marker is located on the leftside
virtical
gridlines of X scales. I am also wondering how to place it on the center.