once you have used the report wizard to create your report; the most effective eay i have found is to open the query behind the report and add field or expressions.
you can do this by scrolling down to the bottom of the report (footer section), right click and open the reports properties dialogue box, click the data tab, click on the button next to the dropdown box for record source.
this will open the query builder which you should find much easier to use for sorting, grouping and adding fields or expressions.
once you have saved the changes to the reports query you can then use the reports fields list tab when the report is in design view to add the new field to the report.
No, I mean in the report wizard, after the step Do you want to add any grouping levels?
Then next step is What sort ordet do you want for detail records? in this screen some times I saw a summary option button. but sometimes I cannot see it?
You only get that part of the wizard if you choose a Grouping Level. So, when you see, "Do you want to add any grouping levels?", either DoubleClick a field at that time or Click a field then Click the > (arrow) to add it. When you click Next, you will then see the Summary Options you ask about.
Sorry, I now figured out, what I want is not summary, it is to count a text field, so in my query there is no numbers, that's why in the report wizard there is no summary option. Now I know I have to add a text field in design view to count the text field.