Is there anyway to change the font color or size of only one record in a
table ?
In a table? Why in a table? Tables are for data storage, not for user
viewing or interaction.
Depending upon how Access can identify the record (you have given us
no indication) you wish to set the different Font Color and Font Size
of, on a form, in any Form View, you can use a control's Conditional
Formatting property to set a control's color and font size.
Select the control.
Click on Format + ConditionalFormatting.
You can also do the same in a Report.