Edit the default page number
Ensure you are in the Report Designer window.
Use the scroll bar to locate the existing page number in the PageFooter area.
It has a default name of TextBox4, however it is distinguishable because its SummaryType property in the Properties area displays as 'PageCount'.
Click and drag the page number item to the desired location.
Edit the size field value and the font field value, if applicable.
The alignment options include an option to adjust selected text boxes to the same height, size or width.
Save your report layout and preview it if you want.